Thirty minutes had passed and the wounded were on the way to the hospital. Fifteen people were dead; ten of them were the CSIs, the other five were lab techs. The five CSIs and Greg gathered around as the ambulance pulled away.

"Come on," Grissom said, "Lets go process the scene."

They nodded and they headed into the building. It was almost similar to their lab expect theirs were a bit smaller and the walls were green. The only thing that was not normally present was the blood spatters, broken windows, and bullet holes. They walked carefully, not disturbing the blood on the floor, or the bullet casings. Soon they head to a room where it was supposedly a lounge. Five of the CSIs were dead, shot, four of them in the chest and the other in the head.

"Man, looks like somebody wanted these guys dead." Nick whispered.

"We should spilt up and search for clues." Grissom ordered.

They nodded, grabbed a partner and went their separate ways, which left Greg with Grissom.

"Uh…What do you want me to do?" Greg asks, nervously.

"You know,"-was Grissom's reply. Greg just shrugged his shoulders and grabbed the latex gloves that were in his brown leather jacket.

Grissom used his hands –with his gloves on- to lift up on of the CSIs arm, he saw a paper underneath.

"They were starting the beginning of shift." Grissom mutters.

He sent it back down and turned around where the wall was behind them, and saw four bullet holes.

"Bullet holes in the walls.." Grissom said.

"Means shot at a close range." Greg finished.

Grissom looked up at him, "Sometimes it still shocks me why you're still a lab tech."

Greg grinned, "Hey after being around a group of CSIs for three years, you kinda absorb the information."

With that said, they continued to gaze around. While Grissom continued to look at the bodies, Greg looked at their surroundings. He glance up and saw something black on the wall.

"Hey Grissom?" he called.

He turned around to see Grissom look up at him, "What Greg?"

"Smile, you're on Candid Camera."

Grissom looked up and saw the camera on the wall, he turned back to Greg and smirked.

"Man, there's blood everywhere!" Nick moaned.

Catherine nodded her head as to agree with him as she picked up a bullet casing and placed in a plastic bag. They both got up and continued to walk down the bloody hall, and then they came upon something written in blood, smeared onto the wall.

The blood on the wall said:

"Those god-damn CSIs deserved it! Even those fucking lab assholes.."

"I guess this guy really hated them!" Catherine exclaimed.

"Yeah, I think we got to find out why." Nick said, quietly.

Catherine took out her camera and started to take pictures of the note.

"Catherine!" Nick yelled.

Catherine looked at the panic-stricken Nick.

"What is it?"

Instead of answering, Nick ran into the room in front of them, Catherine followed. They saw a guy lying on the ground moaning.

"Are you alright sir?" Nick asks.

"I'm going to go get some help!" Catherine called out.

"NO!" the man yelled, he winced at the bullet wound that was in his side.

"My time is almost up, I just have to say, get out of here! NOW!" The man yelled, who was suddenly starting to cough up some blood.

"I'm going to get help." Catherine told Nick, but the coughing man grabbed her before she went.

"Get out…" he whispered before his head hit the ground.

Nick put his fingers on the man's neck, checking for a pulse, "Shit, he's dead."

"What do you think he means by get out?" Catherine wondered.

"The guy was coughing up blood, he must have been delusional. He probably thinks the murderer is still here." Nick said.

Sara and Warrick walked into a layout room of some short and saw four dead people, slumped onto the desks, and one on the floor.

"They must have been the day shift, the folders are out, compared to the other dead CSIs in the lounge room." Sara said.

"Don't be so sure." Warrick warned.

They walked and saw the bullet wounds. All shot in the chest.

Sara picked up the open folder, "Maybe the killer is in here." Sara suggested.

"Sara!" Warrick said.

Sara looked up and saw Warrick looking in the next room. She got up, putting the folder in a plastic evidence bag. She saw what Warrick was looking at. The lab room, probably the DNA or trace lab. There was five lab technicians that were dead, some shot in the back and others who were shot in the back of the head.

"Who would do something like this?" Sara asked, as if she waiting for someone to answer her.

"I don't know, but we have to find out before the killer hurts somebody else."

Grissom and Greg watch the blurry gray and white screen. They saw people walking up and down the lab, talking.

"Grissom, I don't think the guy attacked them in the morning." Greg said.

Grissom roll his eyes and fast-forward the tape.

He stops and rewinds it a little, as they saw black figures bursting through the door. There were five guys, dress in black head to toe. The weird thing was they all ran past the walking people and headed towards the lounge room, shooting the CSIs before turning around and shooting everybody else in the lab.

"Talk about the ninjas attacking the lab," Greg mutters under his breath.

"We should get this tape into evidence and see if Archie can get a good picture of theses guys."

Greg nodded and looked for the eject button. Grissom found a strange sense of smell going up his nose. Isn't that gasoline? He wondered. Then he realized it.

"Greg! Don't push the button!" He yelled.

Too late, Greg had already push the eject button. There was a spark behind the tape player. Suddenly there was a big explosion that shook the whole lab, and the officers outside watches as the Carson City lab burst into flames.