Hello everyone! Sorry for the wait, this one took me awhile to get how I wanted it. I meant to have this chapter up a few days ago but I was really struggling with it, more so than I anticipated. This is a really important chapter and I hope you all like it! I can't wait to hear what you think. Enjoy :)

Chapter Six

"We thought she was missing, Casey."

All the moisture in Matt's mouth disappeared as Antonio's words hit him like a ton of bricks. His eyebrows furrowed, his mouth parting slightly as he tried to understand what he'd just heard. But he couldn't. The words weren't making sense in his mind, the man desperately trying to find another option as to what Antonio could possibly mean.

She couldn't be missing, he had just talked to her. This was Gabby, his Gabby.

She was fine, she is fine. She had to be.

"Matt…" Antonio spoke cautiously after getting no verbal response, looking at the man who was sitting motionless in front of him. It was almost as if Casey was looking past him, the glazed over look settling into his eyes, like he'd shut down. Antonio saw his eyes snap back into focus as the man realized he was being spoken to.

Matt's throat bobbed up and down, his mouth opening slightly only to shut as he tried to think of anything he could say in that moment. The process repeated, Antonio understanding Matt needed a minute to digest this.

"What do you- what do you mean missing?" The words tumbled out of his mouth so softly, Antonio barely hearing them.

"No one had been able to get ahold of her in nearly three weeks, she stopped showing up to work…" Antonio trailed off, Matt getting the sense there was much more to it than just that. It took a minute for his brain to catch up, Casey feeling as if it took twice as much energy to process anything.

When Matt remained silent, Antonio spoke up again.

"What did you all talk about, when she called?"

"Antonio-" Matt started, only to get cut off.

"I'll tell you everything I know, okay?" Antonio relented, "I just need to know what happened when she called you."

Closing his eyes tightly, Matt forced himself to recall every memory from when he first started getting calls from her. This was important, this was Gabby, he needed to tell Antonio everything. If it meant helping her and keeping her safe, he had to do anything he could.

"She started calling two weeks ago-"

"You've talked to her more than once?" Antonio cut him off, earning a swift glare from Matt, the detective backing off and letting him continue.

"She started calling me two weeks ago, but I didn't actually speak to her until last week." Matt was confused when he saw Antonio's eyes narrow at him, the man's body tensing. When his own words ran through his head, he realized how it must have sounded and quickly clarified, "I wasn't ignoring her calls." Matt defended himself. "Every time she called, I picked up, but she never said anything. I didn't know it was her until she said something the last week."

"You didn't recognize her number?" Antonio was partly confused and partly annoyed, but Matt quickly shook his head, realizing he needed to do a better job of explaining himself.

"It wasn't her number, she had been calling me from an unlisted number." Antonio's eyes widened slightly at that information, Matt taking that as a sign to continue. "When she first started calling me, she never said anything. I only would hear breathing. But then last week, she finally said something."

"I don't think she was planning on saying anything," Matt admitted, "but after everything that happened that day, I was frustrated with you and some other stuff…" he trailed off, sighing softly, "I think she could sense that. I threatened to hang up, told her to stop calling, and that's when she said something."

"Do you have the number?" Antonio asked, Matt nodding. He pulled out his phone, bringing up the contact before showing it to Antonio. He turned back to look at Voight, who was already walking towards the table. Snatching the phone from Antonio's grasp, he headed for the exit.

"Ruzek!" He barked before even opening the door, Adam jumping up from his seat and meeting Voight at the door as it was opened. "Run this number, get me anything you can on it." He ordered, Adam nodding as he took Casey's phone and headed back to his desk. Voight shut the door again and went back to his original spot, Antonio turning his attention back to Matt.

"What did you all talk about?"

"Um, at first not really anything. I was kinda shocked, to be hearing from her. After our last talk-" Matt grimaced as he cut himself off, Antonio nodding in understanding of his words. Matt should've known Antonio was made aware of his last conversation with Gabby, he just wished Antonio knew how much he regretted it. But that didn't matter right now. "Anyway, it was kinda weird. Neither of us knew what to say. She apologized, for calling." Matt recanted, closing his eyes as he remembered word for word everything that had been said. Her voice had been on a constant loop in his mind this past week, but he knew he couldn't leave anything out.

"I told her it was good to hear from her, and then I asked how everything was going, if it was everything she wanted…" Casey kept his eyes closed as his spoke, part of him wanting to stay in the memory of her voice, but he also didn't particularly want to see Antonio's reaction to his words. "But she didn't really answer," He opened his eyes, finding Antonio staring at him expectantly, "she apologized again, said she never meant for this to ruin us." He cleared his throat as he felt his resolve weaken, emotion evident in each word.

"I, uh, I asked her why she called me, and she just said that she wanted to hear my voice. But after that she practically pushed me off the phone. I tried to keep talking but she didn't want to. I asked her why she was calling from that number, but she never answered that either." He explained. "And then we were just saying bye. She told me to stay safe, and then hung up."

Matt looked at Antonio, watching as he took in everything Casey had just told him. The group sat in silence for awhile, Antonio trying to gain his footing.

"How'd she sound?" He finally asked, "Did it sound like anything was wrong?"

"She sounded... hesitant? Maybe, I don't know." Matt questioned himself, wringing his hands together in his lap. "Kind of timid," he continued, "but I just figured it was because of what I said to her last time."

"Have you heard from her since?" Matt shook his head sadly, refusing to meet Antonio's gaze.

"I thought about calling her, but I didn't want to push her. I mean, I'm the one who said we shouldn't talk anymore, I didn't want to keep calling if she didn't want to talk to me…" Matt trailed off, Antonio able to see the frustration Matt was carrying, he just wasn't sure if the source of his frustration was with himself or Gabby.

"I tried calling her today though, after you left." Matt finally lifted his head up to look at Antonio, "I called her number and the other number, she didn't answer. I just left a few voicemails." He explained, eyeing Antonio. A numbing silence had fallen over the room again, neither man saying anything until Matt quietly spoke up.

"You gotta tell me what's going on, Antonio."

Antonio took a deep breath, leaning forward to rest his forearms on the table as he tried to find the best place to start.

"Gabby and I had kept in almost constant contact since she first left," Antonio started, Matt nodding as he had known that already. "We'd talk once or twice a week, just to check in. I wanted to make sure she was doing alright. And then once you two got divorced-" Antonio saw Matt tense by his side, "I would call her multiple times a week. I was worried about her, she was definitely distant, especially at first. That hadn't really changed much since the last time I spoke to her." Matt's eyes closed as he listened to Antonio's words, guilt flooding his body. "But overall she seemed to be doing okay." Antonio quickly added, seeing the reaction that had come from Casey.

"Thank you." Matt murmured, Antonio raising an eyebrow.

"You don't need to thank me, she's my sister." He replied quickly, with more force in his words than he intended, Matt giving only a slight nod in response.

"But yeah, we had been talking at least three times a week, up until a month ago. I would call her, and it would keep going to voicemail. She never returned my calls, I'd just get texts from her, saying that she was busy. That she was sorry she missed my call, she'd call me back later, stuff like that…" Antonio trailed off. "Eventually she called me back, but she only talked to me for maybe five minutes before saying she needed to go." Antonio paused for a moment, wanting to give Matt a minute to process everything.

"That call was the last time I heard from her, and that was three weeks ago. She said she'd just been really busy at work and that things were hectic. Said she'd call me again when she got the chance. I could hear how exhausted she was, and after that call I decided I'd ease up on the calls a little bit, let her be the one to contact me." Antonio brought a hand up to cover his face, rubbing tiredly over his forehead. "But after a week of nothing, I called her again. She didn't answer. I kept calling and texting, but never heard from her."

"After a few days of no response, I contacted Chief Hatcher." Antonio saw Matt's back straighten at the name, "I called him, asked him if Gabby was working and he told me no. Told me that Gabby had been given some time off, after an incident at one of the sites a few days before." Matt's heart rate sped up as the words left Antonio's mouth.

"What happened?" He'd spoken before Antonio even had the chance to continue talking, the sheer panic evident in his voice.

"All I know is what Chief Hatcher told me, but I guess... ever since Maria, gang violence in Puerto Rico has been more of a problem. After the hurricane hit, and everything was in such a vulnerable place, they tried to take over. So when all of these groups of people were coming in to help with relief efforts, there was some conflict."

Matt knew Antonio was stepping around what had actually he happened, and he felt his blood pressure rise each second Antonio kept avoiding what Hatcher told him. Catching the hard glare from Casey, Antonio continued talking.

"Apparently since they first arrived, they had a few run ins with one particular gang. Nothing ever got violent, just some territorial problems. But on their newest site, where they were starting the planning for a new hospital- I guess things escalated." Antonio took a breath to gather his thoughts, Matt's entire body rigid as he waited for the detective to continue.

"I don't know specifics, just that Gabby got into it with one of the gang members. You know how she is, she doesn't back down from anything or anyone…" Antonio said, Matt shaking his head. He definitely did know that. "But, from what Hatcher told me, she and one of the guys started fighting, things got heated and- the guy hit her." Matt felt bile rise in his throat, the need to empty his stomach overwhelming. But he swallowed it down when Antonio continued speaking. "They got it broken up pretty quickly, according to Hatcher. The gang left when Hatcher said he was calling the cops, told me he decided to give Gabby a few days off work."

Antonio kept his eyes on Casey once he finished speaking, trying to gauge where the man's head was at. He'd been surprisingly quiet so far, and Antonio wasn't sure if that was a good or bad thing.

"When I called Hatcher, he told me Gabby was supposed to return to work in a couple of days, he'd let me know when he saw her. So I waited. Then I got the call from Hatcher that she never showed up to work." Antonio watched as Matt's head fell to rest in his hands.

"No one's seen or heard from her since she left work that day… no one but you, Casey." Matt's head snapped up, their eyes meeting as an unsettling quiet fell over the room.

Matt's entire body felt heavy as he sat there, the simple movement of resting his arms against the table seemingly taking all his energy. His eyes moved from Antonio to down in front of him, his unsteady hands shaking against the table. He didn't even bother trying to hide the tremoring this time, his brain feeling like it was about to implode.

He didn't know how to make sense of this. At this point, he wasn't even sure he'd fully grasped everything Antonio had told him. This felt like a bad dream, one he couldn't wait to wake up from.

He pursed his lips together, trying to form any coherent thought, trying to find his voice as he looked back up towards Antonio.

"When did she- when did the guy hit her?" Matt finally stuttered out, saying the first words his brain could come up with. He wasn't even sure if Antonio had already told him, he couldn't remember.

"Two weeks ago." He answered, Antonio seeing the look of realization that crossed Matt's face, mixing with the clear pain that had been there since Matt arrived.

"When she first called me- the day she called was when…" Matt trailed off, Antonio giving a simple nod in return. He'd put it together when Matt first started telling them about his calls from Gabby, but didn't want to say anything.

Antonio watched silently as Casey slowly started to crumble in front of him, the reality of the situation hitting him full force. Antonio knew he had more to tell him, there was more that Casey needed to know, but he also knew Matt needed a minute.

Glancing back to Voight, he saw his boss in the same position he'd been in since they all settled into the room, the man leaning against the counter, ankles crossed, holding his arms over his chest. Hank's gaze fell from Casey to Antonio, giving the detective a nod, telling him to continue. Antonio raised his eyebrows in response, knowing he was unsure if now was the best time.

"What is it?" Casey's voice broke through their silent conversation, Antonio's head snapping back to Matt, seeing the firefighter looking back and forth between him and Voight.

"Casey…" Antonio hadn't realized Matt had come out of his thoughts, nor did he realize the man had been watching him.

"Tell him, Antonio." Voight's rough voice filled their ears, Matt's eyes focusing on Antonio.

"Tell me what?"

Antonio could hear the rise in panic in Casey's voice, the man taking a deep breath before answering.

"Casey, Hatcher called me back, after Gabby never showed up for work." Antonio swallowed the lump that had formed in his throat before continuing. "He went to her apartment to check on her, but-" He stopped himself, gripping his hands together.

"But what?" Matt all but shouted, no doubt drawing the ears of the Intelligence Unit sitting outside the door.

"Her place was broken into. The lock had been broken, whoever did it had clearly forced their way in, the entire place was trashed... There was no sign of her anywhere."

Matt felt his entire body go numb at Antonio's admission, his vision blurring and his chest tightening.

"Hatcher called the local police, and then called me after. But they weren't able to find anything that would tell them where she was." Antonio spoke, but he wasn't even sure if Matt could hear him.

"Matt," Antonio whispered, Casey's vision coming back into focus, his blue eyes watering, "the night you spoke to her was the same night Hatcher went to her apartment." He clarified, Matt swallowing thickly.

"Do we know-" Casey cleared his throat, blinking back the tears pricking the edges of his eyes, "do we know if it happened before I talked to her?" Antonio saw the desperation shining in Matt's eyes, and he wished he had an answer for him.

"I don't know, Casey." Antonio responded regretfully, Matt sucking in a shallow breath, doing what he could to keep his emotions in check.

A sudden knock on the door grabbed their attention, Matt turning his head to see Ruzek standing on the other side. Voight waved him in, Adam entering the break room, shutting the door behind him.

"What do you got?" Hank asked quickly, Matt keeping his eyes focused on Ruzek, his gaze traveling to the folder in his hands.

"I ran the number, got everything I could from it, which wasn't much." Adam said with a grimace, "The phone was activated 16 days ago, and from what I can tell it wasn't used much." Matt was surprised when Ruzek looked up from the sheets of paper in front of him, focusing his eyes on Casey. "The only calls made with this phone were to one number… yours, Casey."

Adam saw something flicker in Matt's eyes, but he cleared his throat and continued on. "The last known location was um, just outside of San Juan in Puerto Rico." Adam spoke. He'd had an idea when Matt showed up that it had something to do with Gabby, and this confirmed it. "But that was nearly a week ago. Looks like the phone was turned off shortly after the last call made to you, Casey." Ruzek explained with a sad smile, Antonio giving him a nod.

"Thanks Ruzek." Voight said, the young cop nodding, handing over the file with all the information over to Hank before quickly exiting the room. Antonio eyed Casey, trying to gauge any sort of reaction from his former brother. But he hadn't moved or said much of anything.

"Casey, the cops, they uh- they took photos of the apartment," Antonio saw Matt's body tense from his words, the firefighter looking back at him. "I don't know if there's anything you'd see that would be able to help, but-" The immediate shaking of Matt's head cut off Antonio's words.

"Let me see them." Casey spoke, his voice raspy. Antonio nodded, looking back to Voight who was already on the move. He left the room, returning just as quickly with a thick folder in his hands. He walked over to the table, placing the closed manilla folder down in front of Casey before returning to his spot across the room.

Casey stared blankly at the folder, rubbing the palms of his hands against his pants, feeling a rush of nerves flow through his body. He'd never seen what the inside of her apartment looked like, aside from the glimpses he got through FaceTime the first few months she was away. The first real look he'd get at it was after it had been destroyed, and the thought left an unsettling feeling in his stomach.

Taking a slow, shaky breath, Matt opened up the folder, his eyes landing on the first photo in the stack. Even from the sideways view, he could tell it was a picture of her front door. His trembling hands grabbed onto the stack of photos, picking them up and bringing them closer to his view.

Slowly he began flipping through the photos, each one leaving him with more fear than the last as he saw the damage done to her home of the last five months. As he flipped through them, he tried to picture what it had looked like before the invasion. He tried to picture the living room before the furniture had been flipped and dismantled, tried to picture her kitchen before the table had been knocked to the ground, before there were shards of broken tableware littering the tile floor. Before her bathroom had been ransacked, the contents of her medicine cabinet dumped across the small room. He tried to picture what her home had looked like, before it had been taken from her.

Seeing what had become of her home made his blood boil, anger breaking through the horror he felt. Gabby didn't deserve this happening to her, she didn't deserve to have her home taken from her. A place he could only hope she felt comfortable and safe in, that was now gone. Some monster had robbed her of her security, and now she was god knows where.

He forced himself to keep looking through the photos, his desire to know exactly what happened overriding his fear of the situation. His chest tightened as he saw the first photo of her bedroom. He'd seen it once or twice, when Gabby first moved in, but seeing it like this made his blood pressure sky rocket, his eyes darting around each image as he flipped through them.

Her mattress had been flipped, hanging partially off the bed frame, her sheets ripped as they covered the floor. Her dresser drawers were all open, some of which had been thrown to the ground, their contents scattered around the room. One nightstand had been completely knocked over, the lamp Matt assumed was usually sitting on top of it was now on the floor in pieces.

As he flipped to the next image, his breath caught in his throat at what he saw. Tears welled in his eyes, as his gaze zeroed in on the image in front of him. Hidden partially under an article of clothing was a framed photo. One of them.

The frame had been broken, the glass now in shards and the wooden frame cracked in half, but it was them. He would recognize that photo anywhere. The two of them, wrapped in each other's arms, shortly after they had said 'I do'. Her head was tucked into his neck, him holding onto her as tightly as he could. Neither of them had known the photo existed, not until Kelly gave it to them as a wedding gift a few weeks later. He hadn't known she'd taken it, he was wracking his brain, trying to remember if he'd noticed it missing in it's old home above the fireplace shortly after she'd left, but now he couldn't remember. A tear slid down his cheek, his eyes glued to the broken photo staring back at him.

"Casey…" Matt's eyes flickered up to Antonio as he heard his name, the detective seeing the tear falling down Casey's face, and the others that had welled up in his eyes.

"Do you see anything at all that might-" Antonio cut himself off, taking a breath. "Anything that might help us?" Glancing back down to the photo still tight in his grasp, Matt shook his head side to side. He couldn't stop staring at the picture of the two of them, the one Matt imagined she'd had on her nightstand. Something he realized was probably the last thing she saw before she went to sleep, and the first thing she saw when she woke up. A wave of nausea overtook him, Matt swallowing thickly as he looked back to Antonio.

"No one knows who did this?" Casey's voice was hoarse and barely there, Antonio sure he wouldn't have been able to understand him had he not been right next to him. With a sad shake of his head, Antonio responded.

"No, we don't. It's a good possibility it was the same guys Gabby had issues with, but there's no proof. Or anything, really, that points to them being at her apartment. And there's nothing that tells us where Gabby went, or where she was-" Antonio stopped short of finishing his sentence, but everyone in the room knew what he meant. How if she was home when the invasion happened, there was a chance she was taken in the process.

But Matt couldn't think like that, he couldn't believe that. Wherever she was, she was alright. She had to be. He wouldn't accept any other scenario.

Looking back down at the photos, Matt dropped them down onto the table. His entire body felt hot, and the nausea had yet to go away. Eyes darting around the room, he suddenly stood up, pushing his chair back forcefully as he did so. The sudden movement caused Antonio to sit back in his chair, his eyes moving to Voight before back to Casey.

"I...I have to go." Matt said quietly, patting around his pockets frantically. "Where is my phone?" He muttered, moving around the pictures and the folder on the table, as if they were hiding it.

"Casey-" Antonio tried to stop his movements, seeing the anxiousness rise in the firefighter.

"I need to go." Casey's voice rose significantly, his hands running over his pockets again, every movement he made causing Antonio to become more concerned. "Where the hell is my phone?" Matt shouted, Antonio seeing the heads of the Intelligence Unit snap towards the breakroom.

"Matt, calm down. Ruzek still has your phone." Antonio tried to calm him, but it wasn't working.

"I have to go Antonio!" He yelled, pushing the detectives hands off him, Antonio taking a step back with his arms up.

"Where, Matt?" Voight asked, his voice as steady as ever.

"I have to go home, I have to pack." He said quietly, Antonio furrowing his eyebrows.

"What do you mean pack? Where are you going? Matt, wait-" Antonio grabbed his arm as Casey tried to head for the exit.

"I'm going to Puerto Rico, I have to find Gabby." Antonio's eyes widened at Matt's frantic words, tightening his grasp on the man's arm so he wouldn't slip away.

"Casey you can't go to Puerto Rico, we don't even know where she is."

"But I have to-" Matt pulled himself from Antonio's grip as he spoke.

"Matt, you can't-"

"Dammit Antonio!" Matt screamed in anger, "I have to go find her! I can't just sit here and wait!" The decibel of his voice never lowered, Matt grabbing a fistful of his hair in anguish.

"Matt..."

"You can't just tell me she's missing, she hasn't shown up for work, that her apartment was trashed, and then expect me to sit here and do nothing!" Casey was pacing around the room, his thoughts coming out in shouts before he could even process them. "God knows what happened to her! If they took her, or if she's hurt, I can't just stay here when she needs help!"

"Casey, calm down-"

"Don't tell me to calm down! You should've told me, Antonio!" He yelled, his sights set on Antonio as he stopped his pacing. "The second you thought something was wrong, you should've told me! I should have known, I could have gone down there weeks ago, and maybe she'd be here with us right now-"

"Matt, you going to Puerto Rico won't solve anything." Antonio tried, "it won't help anything. You said yourself, she hasn't been at work or at home, you'd have no idea where to look for her. You would have been wandering aimlessly around the city, and what? Just hope you'd run into her on the street?"

"But I could've at least been looking for her! I can go look for her!" He screamed, his anger and frustration getting the best of him as he grabbed the chair in front of him and threw it towards the wall, the offending object banging off the surface before crashing to the ground, the blinds shaking against the glass.

"Casey!" Antonio shouted, reaching for him to try and calm him down.

"Antonio, don't." Hank's voice stopped him, the younger detective looking back towards his boss, seeing the older man shaking his head. "Just give him a minute."

Antonio took a few steps back from Casey, seeing the firefighter pacing back and forth across the small area. He could see Matt's resolve crumbling, the broken man falling to pieces right in front of him. Matt stumbled over to the wall, sliding down the hard surface as his gaze stared blankly ahead of him. Antonio saw the tears falling down his cheeks, the worry and fear finally taking over.

"I should have been there…" He whispered, wiping lazily at the tears that had fallen. "I should have been there with her-" He sucked in a harsh breath, Antonio's face falling as he listened to Casey's words. He knew Matt meant more than just the past few weeks. Antonio knew that Gabby had asked him to come with her, that she wanted them to be together, and he could only imagine what was going through Matt's head right now.

"I could've-" He choked out a breath, "I could've protected her. She shouldn't have been there alone, I should have-" He cut himself off again, his head falling into his hands as he finally broke. Tears flooded down his cheeks, his body shaking as the last of his resolve disappeared.

Antonio watched as Casey broke down, a deep frown covering his features, feeling tears well in his own eyes.

Hank stared stoically at Casey, seeing a vulnerability that he'd never seen from him before. His gaze moved upwards, seeing the members of his unit looking in the breakroom, no doubt having heard and seen the breakdown Matt was having. With a slight shake of his head, they all got back to work, knowing they'd be told if they were needed.

Antonio blinked furiously, willing the tears sitting in his eyes away as he took a deep breath, walking slowly towards Matt. Crouching down in front of him, Casey looked up, Antonio seeing the clear look of defeat in his eyes.

"I love her Antonio." Matt whispered before Antonio could say anything.

"I know." His voice was just as quiet as Matt's, "I know you do."

And he did. Any doubt Antonio had of just how loved his sister was, was now gone.

"I need to find her." His voice was still quiet, afraid that if he spoke any louder he'd be unable to get the words out. "I can't- I can't lose her, not again."

"I know." Antonio repeated, "We're gonna find her, Matt. I promise… we're gonna get her back."