ORLANDO, Fla. -- Jurors seated in the Michael Hernandez murder trial heard gripping testimony Monday from the man who was the lead detective on the case.

Miami-Dade County detective Salvatore Garafalo spent most of the day on the stand, after being called as a witness for the prosecution.

In a police interrogation room and seated across from the lead detective on the case in 2004, Hernandez offered a chilling confession.

“He brought a knife and he brought latex gloves," Garafalo said, referring to statements that Hernandez made under interrogation. Garafalo was asked in great detail about the confession that was captured on videotape.

On the tape, a then 14-year old Hernandez, calmly and methodically appears to offer police a step by step synopsis of how he murdered classmate Jaime Gough.

"I took the knife out, and I proceeded to slit his throat," Hernandez said on the tape.

"Why did you choose Jaime, your friend?" Garafalo asked Hernandez on the tape.

"He was the easiest out of anybody because he would've followed me because we're such good friends," Hernandez said.

On the tape, Garafalo asked Hernandez how he knew Jaime was dead.

"I made sure by taking my knife, the point of my knife, and poking him in his face, and I checked his eyes, also," Hernandez said.

Garafalo testified in Hernandez's trial on Monday. Under cross-examination, Garafalo faced a litany of questions by Hernandez's attorney, who took one more step toward an insanity defense.

"You didn't know anything about Michael's mental state, did you?" Hernandez's attorney asked.

"No. He seemed like a normal kid," Garafalo said.

"But you hadn't spoken to his parents?" the attorney said.

"No, I did not," Garafalo said.

The trial, now in its in its second week, is playing out in Orlando after a pool of Miami-Dade jurors claimed they knew too many details about the high-profile case to give it a fair shot. Defense attorneys are hoping to prove a not guilty verdict by reason of insanity.