Disclaimer: I totally wish I owned CSI but I don't. :(

Set in season 10 or 11... No real time line but a fair amount of time after Riley left.

Familiar Faces.

Suspect On Scene.

Greg arrived at the crime scene within 10 minutes. He pulled up to the curb of an old house where he saw Catherine standing with Nick and Ray.

He jumped out of his car and walked briskly to Catherine's side. "Hey, what's going on?" He asked her quickly.

She turned to face him. "There might be a suspect on scene, but I think he might have a hostage. We're waiting for Brass to figure out what to do." She said in a worried voice. It was odd to see her so shaken.

Greg moved to stand beside Nick who also looked worried. "Mind filling me in?" He said, knowing something was up. Nick gave him a stressed look.

"I don't know man. This guy's a serial killer and he kills his victims in front of the people they love. I have no idea who he has in there but we don't know if he has the family as well." He said in his Texan accent. The thought of killing someone in front of their family made Greg feel sick.

They waited for a few minutes more before they heard a voice in the house. Greg exchanged a glance with Catherine who looked stressed.

Just then Sara pulled up in her SUV and hurried towards them.

"Guys, this was my case, we don't have time to sit and wait, he's going to kill who he has now. We need to stop him." Sara said in a firm tone. Catherine looked conflicted but nodded her head.

Greg looked into Sara's eyes. She looked worried... no, more than worried. Sara rarely looked like that. This must be bad.

Greg and the others pulled out their guns and watched as Nick carefully opened the front door. They followed him into the old house.

The floorboard creaked as they stepped quietly into the house. Greg stayed close to Sara, he never knew why but he felt protective of her.

They cleared the first floor and Catherine motioned for them to split up to take upstairs and down. Greg stayed with Sara and Catherine as they went upstairs and watched as Nick and Ray made their way down the wooden steps beside them.

Greg followed close behind Catherine, who lead them forwards. All three CSIs froze when they heard a hushed voice. Catherine gave them a warning look and finished the steps. Greg was filling up with worry by the second.

Then they heard the voice again. It was a man, the voice was deep. Catherine followed the voice to a door at the end of the hall.

Greg cautiously stepped towards it. He heard a woman's voice which was quiet and sounded worried.

Then the man spoke up and he realized that he was talking to them.

"Hello CSIs. So I'm sure by now, you know who I am. And so you know how I kill my victims right? Well come on in. Because your my audience this time." He said roughly.

Greg stared back at Sara and Catherine who had the same fear etched on their faces as he did. Who did this guy have? Who could consider the CSIs family?

Greg pushed his ear to the door. "Come on guys. I need my audience." The man said again.

Greg listened closely and froze when he heard the woman's scared voice again. There was no mistaking that voice. He could recognize it anywhere. That was Riley.

"Shit." He whispered.

:( Poor Greg.