Voight collared Halstead as soon as he next set foot in the bullpen.

Jay was heading towards the break room to get a much needed coffee before reading through the statements from each of the girls but Hank stopped him in his tracks and ushered him into his office.

"Take a seat Halstead" He motioned for Jay to be seated upon a chair across from his desk which he did.

"What's this about Sarge?" Jay asks, hoping he hadn't done anything wrong that could warrant him being in this situation.

Voight brought the locket out of his pocket and handed it to Halstead. Jay took the locket and looked it over once before opening it up and examining the picture inside. He inhaled sharply at the sight of the girl. The one he hadn't seen for at least 10 years. "Sarge… where did you find this?"

"It was in one of the cages at the crime scene." Voight paused and took in Jay's reaction, which was mostly confusion and shock, before he continued. "Who is she Jay?"

Halstead mulled the new found facts in his head. It all made sense when Voight showed him the locket. The strange feeling that he knew those people was because he did know those people.

Jay took a deep breath and raked a hand through his hair before he spoke "Her name is Jessica... She's my sister"

IIIIIIIIIIIIII

After half an hour in his office, Jay walked out looking unnaturally pale. Erin looked at him as he walked out, thinking he had just been fired or something but when Jay simply sat down at his desk that theory was disproven. If he had been fired he would have been out right this second, like Sumner was almost a year ago. Voight would never wait till the end of shift for him to leave.

A few minutes later, Voight emerged from his office and after shooting Jay a look that was almost sympathetic, pinned another picture up on the board. All of Intelligence gathered round looking at s picture of a girl who wasn't any older than 6 in the photo.

"Jessica Harrington 16 years old, a possession of hers was found in one of the empty cages. We suspe-"He was cut off by Atwater.

"Wait, Harrington? As in Mary and Colin? They did this to their own daughter? Damn that's messed up"

"Adoptive daughter." It was Jay speaking this time; he rose from his seat and positioned himself in front of the board, addressing the whole unit. "She is my sister. She was adopted by the Harringtons when my parents were deemed unfit. Will and I were too old to be put in the system," He took in a ragged breath struggling with the situation, "she's my baby sister and I let this happen to her."

Voight stepped forward again, continuing from before "As I was saying we suspect that Jessica was one of the girls who weren't there when we stormed the place. No one leaves until she is found. As far as I am concerned, they took one of our own" Everyone nods solemnly. No one was thinking of leaving anyway, especially Erin.

She walked over to Jay's desk once everyone had dispersed and laid a comforting hand on her boyfriend's shoulder, "don't worry Jay, we will find her".

"Er these people, they've been inside my house heck we even had them over or dinner one time. All that time, they were doing this to those girls yet I let Jess go with them"

"You couldn't have known Jay; you weren't even a cop back then."

Jay said nothing; the guilt still plaguing him as if it was a disease and it had spread all over his body. He usually hid his feelings well but this situation was completely different. He thought he'd lost Jess forever when they lost contact after the Harringtons moved to Indiana all those years ago. He remembered how he and Will had tried to get their new phone number but Mary refused to give it to them; saying they wanted Jess to have a stable family and not get too confused. They had said she was happy and that's all Will and Jay had wanted for their younger sibling. Part of him still felt responsible for all of this. He knew that he couldn't have known what they were going to do but that didn't excuse him from not taking care of Jessica. He should have visited her more often.

Lindsay stayed with him for another few minutes before giving him a sad smile and moving back towards her own desk with only one thought on her mind 'we're going to catch these bastards and put them away'.

IIIIIIIIIIII

Jessica Harrington awoke to find that she was no longer in the cage that had inhabited her for the past few months, but in a hotel room. She sat up looking around the room instinctively putting her hand to her head when she felt pain. Nothing seemed familiar in the hotel room except the unconscious forms of the other two young girls in the room. She certainly hadn't been here before but knew that she was still in Chicago. Jess recognised the buildings she could see out of the window. The youngest Halstead put her hand up to her neck, forgetting she had left it behind for someone else to find.

Jess wasn't stupid. She had known that Jenna has escaped a few days ago which meant that the police were going to come sooner or later. 'If only' she had thought at the time 'if only Jay and Will knew'. It was this thought which had given her the idea to drop the locket. They'd identify Jay and Will from the picture and they'd find her. There was no doubt in her mind that they were doing everything in their power to find her. And she was right.

IIIIIIIIIIII

Will Halstead had been doing is usual rounds a Chicago Med when Dr Natalie Manning had approached him. "Hey Will, Jay's here". This immediately sent Will into panic mode.

"Has he been shot or something?" Will asked quickly, hoping to get to his younger brother as soon as possible.

"Oh god no" Nat answered, "he just wanted to see you; said it was relating to an investigation." Will nodded and walked out towards the main entrance to find Jay.

When he caught sight of him, Will knew something wasn't right. Jay was really pale and looked as if he were about to faint. The last time he remembered Jay looking like that was when their mother died.

"Jay," he spoke "what's wrong?"

"Will you need to listen to me carefully. This is gonna be a massive shock but you need to listen to me" the detective looked up at his brother "okay?"

Will nodded, bracing himself for whatever Jay had to tell him.

"It's Jess…"

Ending on a bit of a cliff hanger there! Sorry for the delay in updating, I've been a bit ill over the past few days and haven't really had the motivation to do anything.

Next Chapter: Will reacts to the situation with Jess and we find out more about how Jess' life has been with the Harringtons.