It was a grenade launcher.

That much became clear when they approached Parrish who was holding up the weapon in question with clear disbelief on his face. It matched John's expression.

"Where the fuck did she get a grenade launcher?" Parrish asked, seeking help from his boss but John was still trying to comprehend what he was seeing.

"Well, her brother is an arms dealer," Stiles piped up but at the same time, he wanted to throw up. This was what the hunters had used to launch their homemade wolfsbane grenades into the Hale house. After they had sealed it with mountain ash.

"Argent didn't say anything about grenade launchers." Parrish carefully put it back in the trunk and took a step back, still eyeing it as if he expected it too shoot a grenade at him.

"Did you ask him about them?" Stiles couldn't help but ask at which Parrish glared at him.

"Why are you even here?" The deputy asked. "This is an ongoing investigation. Do I have to remind you that you are part of what we are investigating?" Parrish asked but he was looking at John for an explanation of why Stiles was there.

"He promised to stay in the car, didn't he?" John gave him a look to which Stiles backed off. He stayed close enough to see and hear everything, though. Not that there was anything interesting happening. John had a look into the car himself but made sure to not touch anything. Then they were just waiting for the truck to tow the car in. Forensics would have a closer look back at the station.

"The Argents have family in France," Parrish pointed out. "Bet she's already halfway there."

John nodded grimly to that.

It was more than likely that Kate had fled the area right after the attack, Stiles had to agree. Why her brother was still here, he didn't know, though.

"I want to talk to Chris," John decided and he was about to send Parrish off to bring him into the station but Stiles stepped in.

"You think he'll rat out his own sister just because you ask nicely?" Stiles asked John in a low voice. What he was about to say was not for Parrish's ears.

"Do you have a better idea?" John asked, the sarcasm clear in his voice.

"To ask not nicely." Stiles gave him a predatory grin. It still took some talking but in the end, Stiles was with John on the way to have a chat with Chris while Parrish stayed back to bring in the car.

Chris didn't seem surprised to see the sheriff at his door but he did raise an eyebrow at Stiles.

"Can I come in?" John asked.

"Do you have a warrant?" Chris crossed his arms over his chest, blocking the door.

"We can have this talk here or at the station, your choice." John put his hands on his hips, not actually on his gun but close enough to make the point.

"Come back when you have the papers for that." Chris moved to close the door in John's face which Stiles used to slip past him.

"Hey!" Chris tried to hold him back but Stiles ducked out of his reach and was in the house.

"Keep your kid in line." Torn between following Stiles and keeping John out, Chris didn't know what to do.

"I think we have established that I have no relations with John," Stiles said over his shoulder and strolled into the living room. "Hello, Mrs. Argent."

"Out of my house." She fixed him with a cold glare which Stiles chose to ignore.

"Or what?" Stiles had a look at the photos on the mantle of the fireplace. "You're going to call the police on me?"

From the door he heard an amused huff from John who went into full sheriff mode a second later: "Sir, I think you have an intruder in your house. For your own safety, stay back and let me handle the situation."

Stiles half-expected him to draw his gun to complete the picture but sadly, he didn't go that far. John used the moment of confusion and marched past Chris.

Accepting his defeat, Chris closed the door and followed John to the living room.

"What do you want?" Chris asked once they were all standing there between flowery curtains and cross-stitches on the wall.

"We found Kate's car. With a grenade launcher in the trunk. Care to explain how she got her hands on one of those?" John stood in the middle of the room, hands on his hips again.

"I have no idea." Chris sat down in one of the chairs and reluctantly his wife followed his lead. Like a fifties housewife she was sitting on the sofa, her hands in her lap, but Stiles didn't get fooled for one second. He wouldn't be surprised if there was a gun hidden between the throw pillows.

"You're her brother and an arms dealer," John stated. "That's enough reason to believe that she got that weapon from you. Which would make you an accomplice."

"Prove it."

"How about no." Stiles stepped in. John had his fun but there was still Peter, fighting for his life. They didn't have time for games. "You are going to tell us everything we want to know. Now."

"Who are you?" Victoria asked. "And why would we tell you anything?"

Stiles turned back to the mantle and picked up one of the framed photos.

"This your daughter?" The picture had been taken at a sports event. Archery if he was not mistaken. "Allison, right? She's currently staying with your father in France."

"Is this an attempt to threaten us?" Chris seemed to be amused by that idea.

"Actually." Stiles put the photo back. "Yes, it is. Do you remember Derek? Big guy, came in here one night? You tried to shoot him and he almost drowned you?"

That got him their attention.

"So you lied when you said that you don't have control over him," Chris said and leaned back in his chair.

"I can't tell him what to do." Stiles studied the other pictures. "But I can ask. And right now I am the only thing standing between you and a wet death."

"You're the sheriff." Chris turned to John. "Shouldn't you do something about this? I'm pretty sure it's illegal to threaten us like this."

"Oh, you misunderstood." Stiles didn't give John the chance to say something but it looked like he didn't have the intention to intervene anyway. "Derek wants to kill you. He wants to come after everybody involved in the fire. I saw Kate fleeing the scene so she'll be the first he's coming after but he won't stop there. Derek would like to kill the others who have tried to burn a whole family alive but without names, he'll just go after the ones he knows."

Stiles turned away from the pictures and gave the Argents his full attention.

"You." Stiles nodded at Chris. "Your wife here. Your father, your daughter. Don't think that they're safe in France. He's going to kill your whole family. Just like Kate tried to kill the whole Hale family." He paused to let his words sink in. "The only reason you're not dead already is that I asked him not to come after you. But if you don't start talking now, I'm going to rethink my decision."

"Allison has nothing to do with this." If anything Victoria became even icier.

"Neither had the nine-year-old I had to give mouth to mouth to," Stiles countered. "Her only fault has been that she was born into a werewolf family. But that was enough for Kate to want her dead."

"Stiles." John stepped in. "That's enough."

John took a seat in the other chair and gestured for Stiles to take a seat as well. The only spot left was next to Victoria on the couch and Stiles almost felt the icy waves coming off her when he sat down.

"I don't want anybody to die," John stated. "But if Derek decides to come after you, there's nothing I can do to stop him. Sadly, the same goes for this one." He jerked his thumb in Stiles' direction.

"You could arrest this little brat," Victoria suggested. "He is threatening to get us killed."

"How often did you arrest me?" Stiles asked, trying to recall how often it had been. Not that often, John had soon realized that there was no way to hold him.

"I stopped when your escape trick started to get me in trouble." John pinched the bridge of his nose at that memory.

"He tried stern talks after that," Stiles told the Argents. "At some point, he started to feed me."

"And I never got rid of you again." John let out a sigh. "However, point is that I have no control over Stiles or Derek. I cannot protect you. When your buddies kidnapped and tortured Stiles, they crossed a line. You know what happened to Daniel Page. I don't want any more dead people. What I want is for your sister and her friends to face the consequences of what they did. In court."

Chris thought about it for a long moment but Stiles knew that it was only for show.

Chris started to talk.

Kate had gotten the grenade launchers from him. Four in total which went along with what they had deducted from the scene.

"That was months ago," Chris said. "I didn't know what she was planning but when I heard that she was substituting as a teacher at a High School, I followed her here to keep an eye on her."

"You did a really good job there." Stiles let the sarcasm drip from his voice.

Chris glared at him.

"She stayed low for weeks and I think that she used the time to become friendly with a member of the pack."

"To gain some intel." Stiles nodded, it made sense.

"For a while, I thought that she had seduced Peter …," Chris started but was interrupted by Stiles.

"Peter?" Stiles' voice toppled over in disbelief.

"He's a single man, living in the main house," Victoria spoke up. "We heard rumors that he's seeing someone. He's been single since his wife's death. All Kate had to do was to make pretty eyes at him."

"Peter?" Stiles repeated because obviously, they had no clue what they were talking about. At all. "Peter is the left hand of the pack and suspicious as hell, the only reason he would date Kate, and he would know that she's a hunter in five seconds flat, would be to gain intel on her. He would love that dance, trying to outsmart each other. But no, he's not dating Kate."

"Better men have been blinded by a woman." Victoria gave him an almost pitiful look. As if his faith in Peter was adorable.

"If Kate was using somebody from the pack like that, it's not Peter," Stiles said, already going over the inner core of the pack in his mind. Walter was single. Anthony and Michael were both married but that was not a reason to rule them out just yet. Boyd was head over heels for Erica, him Stiles ruled out immediately. Besides, Boyd would be a bit young for Kate. Same for Isaac. Not that that was a reason to rule out anyone either. Stiles liked Isaac but the seventeen-year-old was still a teenager. And with that easy to impress and to manipulate. Kate had not been teaching his grade but she could have approached him at school. Maybe they should have a talk with him. Stiles glanced over to John, making a mental note to bring this up later.

"What makes you so sure that it's not Peter?" Victoria wasn't buying it.

"Because I'm the one he's seeing."

"You?"

"But you're what? Sixteen?" Chris made a disgusted face, probably adding one more reason to his list of why he disliked werewolves.

"I was eighteen," Stiles corrected. Why was everyone making him younger than he should be? "But by now you can add a zero. And no, I'm not going to tell you why."

Before anybody could say something to that, Derek came in through the kitchen door.

"Stiles."