Staci Collins stood up on the roof of her apartment building looking down at what was going on below. She could see the lights from the police cars twinkling wildly.

" Cops," Staci thought," Here they come. They're here for me. I don't want to talk to them."

The apartment Staci lived in was small compared to others in the city, but it was in a well populated neighborhood. Staci didn't know what was being planned below.

Below Mac was down below with Stella, Danny, and Flack. They were ready to go in with their weapons drawn if it came down to it. Flack updated them on what was going around inside.

" All the residents in the building have been notified of the situation and are staying in their apartments until we have the situation under control. According to the manager, Staci isn't a threat."

" She's armed, which means it's a dangerous situation," Mac said," We do what's necessary to get Staci to come down."

Back up on the roof, Staci saw the movement.

" Here they come. You don't know what you're getting yourselves into coppers."

It didn't take long to get up to the roof. Staci looked and saw them come through the doors, with their service weapons out. At first, Staci saw them look around. She tried to stay hidden, but Mac saw her.

" Staci Collins, NYPD. You're surrounded. There's no where for you to go," Mac said," It would be better for you to come out now."

Staci didn't want to give up yet, but Mac was right, there was nowhere for her to go.

" Don't make this harder on yourself," Mac said," You don't want this situation to escalate, do you?"

Staci decided to keep the conversation going.

" Who are you?" Staci asked," You know who I am. I think I deserve to know who you are."

Mac didn't answer for a second.

" Detective Mac Taylor, New York Crime Lab."

" I know why you're looking for me, but you only need to hear this. I didn't kill Ethan. I wouldn't do a thing like that."

" Why don't you come out and we can talk about it more," Mac told her," That's all we need to do for now."

Staci didn't look his way. In fact, she went to the other edge and looked down. Staci noticed more police cars and she shook her head, she was surrounded.

" What am I doing?" Staci asked herself," This isn't me. I don't run away."

Staci looked at the gun in her hands and didn't notice that Mac was now behind her.

" Drop the gun," she heard.

Staci placed the gun on the ledge and pushed it away.

" I didn't kill Ethan. You have to believe that."

Staci ended up sitting on the ground and looked around her. The police who surrounded her had now put their service weapons away.

" You need to get up now," Mac told her," You're under arrest."

" Didn't you just here what I said? I didn't kill him. I have no reason to kill him."

" Get up," Mac told her again," Don't make me force you."

Staci got up.

" Fine. You won't listen to me. Then I've got nothing more to say."

Flack got behind her and was able to cuff her and took her downstairs with Mac, Stella, and Danny behind him. As they got downstairs, Flack looked at the crowd that had gathered and his eyes happened to find Emily.

" Don. What is it?" Mac asked.

" Over there. In the crowd. Emily McKenzie is there."

Mac looked into the crowd and saw Emily as well, even though Flack was the one who talked to her.

" Put Staci in the car. I'll go talk to Emily."

Emily didn't move for a moment, but then did when the crowd was told to disperse. Mac ended up stopping Emily.

" Emily McKenzie."

" That's right."

Flack ended up coming up to them.

" Staci is being taken to the precinct."

" You," Emily said.

" What are you doing here Ms. McKenzie?" Mac asked her.

Emily didn't know what to say at first.

" I came here to check on Staci. It's unusual for her to miss class. I came here to see if she was okay. I guess not."

Mac and Flack looked at her and both thought that Emily had more to say.

" You know something else," Flack told her," You know something more about Ethan Crowley."

Emily didn't answer.

" You're coming with us," Mac told her.

" Am I under arrest?"

" Do you want to be? Flack asked her," It can be arranged, if you don't want to cooperate."

" Okay, but I don't know anything else, except Staci didn't kill Ethan and I know that for a fact."

Emily didn't fight anymore and agreed to be taken in and Mac began to wonder if Emily was telling the truth or leading them to another dead end.

In the meantime, Lindsay and Sheldon went to go talk to Clarissa Wallace. They found out that she was sent home from the hospital, so they went to Clarissa's house. Lindsay knocked on the door and saw someone look out the window and then open the door.

" Clarissa Wallace?" Sheldon asked.

" Yes."

" We're from the crime lab," Lindsay told her.

" Crime lab?" Clarissa asked," What do you need? Wait, I remember. Someone else from the crime lab came to see me in the hospital. Please, come in."

Lindsay and Sheldon came in and Clarissa shut the door. Clarissa then went into another room and came back out with a sweater.

" You might need this. It's the sweater I got caught in the door of Ethan's car. It's torn here now."

Clarissa showed both Lindsay and Sheldon the tear that was at the bottom.

" You may take it if you need to."

Lindsay just nodded her head and took it. Clarissa just nodded her head.

" I still can't believe Ethan's dead. I've been thinking about who would want to harm him, but my mind is blank."

Sheldon pulled out two photos.

" Do you know these girls?"

Clarissa looked at them.

" Yes. Emily McKenzie and Staci Collins. We're in the same program together. Why do you ask?"

" Did you know they also dated Ethan?" Lindsay asked.

Clarissa shook her head.

" I didn't ask Ethan about his past. Maybe I should have."

Clarissa sat down.

" I don't think we need anything else," Sheldon told her," If you think of anything else, give us a call."

" I'll do that. Who should I ask for?"

" Anyone can take the call, but then transfer you to the right place," Lindsay told her.

Sheldon and Lindsay left the house.

" There's more to this case," Sheldon said," All we need to do is find it."

" Let's go check back at the lab and see what Mac came up with."

It didn't take them long to find out where Mac was, they both had messages on their phones.

" Mac's at the precinct," Sheldon said.

" Talking to Staci Collins," Lindsay added," Maybe she can shed some light on this."

" If not then we have a lot of work to do."