"Cat!" Nick called out. The model-like woman walking towards him stopped smiling when she saw his expression.

"What's wrong?" She asked.

"It's Greg. He's in trouble." Nick explained.

"What kind of trouble?"

"All the evidence in a triple homicide points to him."

"Good thing my boss just sent me over here to work on a triple homicide." She said, pulling her long platinum blonde hair into a ponytail.

They walked to the break room as Nick explained the details of the case. Greg's fingerprints had been found at the scene, along with a few of his hairs, and to sweeten the deal, he had argued with one of the victims the day before.

"Motive, means, and opportunity," Brass said. "It's a triple threat."

"I don't think Greg could do this." Sara stated.

"Hey, nobody wants him to be guilty, but he's not looking so good right now." Brass told her. "It's his day off, nobody has seen or heard from him, and we have no way of finding where he is."

"Exactly." Cat spoke up. "We have no way of proving where he was or was not at any point in time after he left here last night."

"Cat do you really think you should be working this case?" Fin asked. Cat tossed her a piercing glare.

"Are you suggesting that I might be unprofessional simply because my brother is a person of interest?" Cat's bright green eyes blazed with anger.

"You're too close to this." She replied.

"And you should try worrying about catching whoever actually committed these murders instead of trying to kick me off the case." Cat spat as she stalked out of the room.

The room was silent as her words sunk in. They could all feel her anger even though she was gone.

"I'll talk to her." Morgan said quickly following Cat.

"Cat!" She called out.

"What do you want?" Cat growled, clearly still completely pissed off.

"Hold up." She caught up to her and showed her a message she had received that morning: Tell Christina I'll be okay – Francis Crick.

"He knew he was in trouble." Cat said, her anger having vanished. "Did he tell you that my name is Christina? That I go by my middle name?"

"Yeah. He told me a while ago. And Francis Crick is one of the founding fathers of DNA, which is his specialized area."

"He didn't do anything wrong." Morgan stated.

"Nope." Cat agreed.

"Does he have an alibi?" Morgan asked.

"He got home after shift last night. I was still there at home, he went to bed, and I left for work. I suppose if cops started banging at the door saying they were there to arrest him he would have bolted."

"Why didn't he just go in with them?" Morgan asked. Cat gave a bitter laugh.

"Because it doesn't matter if he's innocent. The moment those cuffs go on, his career is over."

"So he's gone?" Morgan asked.

"For now." She sighed. "Even if you saw him, he'll probably have disguised himself so that no one would recognize him.

"Really?"

"Yeah. He's good at hiding."