Disclaimer: I've no ties to the CSI TV shows or any of the characters. Thank you.

Mac frowned as he stared at the computer monitor. Danny had shown him his findings on William Paul Derringer, but something was not adding up to Mac.

"William Derringer seemed to get nervous when we asked about his former wife, Macy, who is Jana Stephenson's mother," Danny said, trying to make the muddy waters surrounding the Eleven Killer case clearer for his supervisor.

"There's got to be a reason for him to suddenly clam up like that. A big one. Someone's hiding something and it's getting more and more confusing by the second." Lindsey said, sighing.

Mac studied the computer monitor a moment longer, and Danny could almost see the wheels turning in the other man's head. Mac was smart, there was no doubt about that, and Danny knew that he would eventually come across the missing pieces to this ever-growing puzzle.

"Let's get him in for questioning," Mac finally said, rubbing his forehead.

"Put the heat on him and find out what it is he's not wanting to discuss."

Danny nodded;

"Yes, sir," he said, rising to his feet and pulling his keys out of his pocket.

Just then, Mac's cell phone rang. He answered, and Lindsey saw his expression darken. She motioned for Danny to hold on a moment. They didn't have to wait long. Mac rung off, and flipped his cell phone closed.

"Don't worry about Mr. Derringer right now. There's been another murder."

"Where at?" Danny asked, and Mac raised an eyebrow.

"Apparently, someone heard a confession they shouldn't have," he said, and motioned for the CSI's to follow him out of the lab.