LOUISVILLE, KY. (WDRB) -- For the first time, a witness in the Joshua Young murder trial said Young confessed to killing 14-year-old Terrence "Trey" Zwicker. 

On Friday, Jahaira Friend testified about Joshua Gouker, Young's father, who was sentenced to life in prison for Zwicker's murder last week. Jahaira Friend, says she and a friend went with Gouker and Young to Tennessee to go swimming at a hotel. She claims that Gouker had a gun and later forced a woman to drive them to Alabama, before police caught up to them.

She said during the trip to Alabama with Gouker and his son, Joshua Young confessed to the crime. 

Friend told jurors that "Josh Gouker had asked me if I knew who killed Trey, and I said, 'No.'  And he said, 'Little Josh did.'  And I looked at Little Josh and I said, 'You killed Trey?'  And he said, 'Yeah.'"

Friend also told the jury that she didn't feel safe with Gouker and Young.

"I was just as scared of Josh Young as I was of Josh Gouker," she says.

Earlier on Friday, the judge allowed a medical expert to be called out of order. Defense attorneys called Dr. George Nichols, a former chief medical examiner from Kentucky.

Nichols said, based on Zwicker's injuries, it is possible that Trey Zwicker could have been killed by one person. As graphic photos were shown in court, Young became emotional, putting his head into his hand as he was consoled by a social worker.

It was the first time Young has shown emotion in the courtroom. 

Dr. Nichols told the jury based it's unlikely an initial strike killed Zwicker, but it could have knocked him unconscious.  He says Zwicker died of traumatic brain injury and had at leave five proven injuries to the head, back, and neck.
He says he can't tell how many times he was beaten however.  
"What's the maximum number of strikes you can determine. How many more than 5. Could there have been 20, 15, the defense attorney asked.  
"More than enough is the answer," says Dr. George Nichols.
Nichols also testified that it doesn't appear from the injuries that a baseball bat was used on Zwicker.  He says it was an object that was rod-like, but in his opinion, not a bat.  It was suggested early on in the investigation that a bat was used. 

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