As Bernie Serrano, who is accused of killing 18-year-old Jacob Langworthy in January 2005, laughed with his attorney, Langworthy's family sat behind him in disgust in the Levy County Courthouse on Tuesday.

"It feels like a knife going into my heart looking at him. Just seeing him there, like he didn't do nothing," said Jacob's mother, Windy Langworthy.

Serrano is accused of shooting Langworthy in the head, execution-style during a home invasion robbery on January 5th, 2005.

Authorities say Serrano, who was 17 at the time, and four other teens broke into Langworthy's home, looking for drugs and money.

The other four co-defendants all claim it was Serrano who pulled the trigger, and pleaded guilty to manslaughter charges last year.

Each of them is expected to testify against Serrano.

"The co-defendants were all interviewed separately at different times not having access to each other. It doesn't take much to be able to put together a pretty consistent version of events through their testimony," said Spencer Mann from the State Attorney's Office.

Jurors heard statements from at least ten different witnesses, with the possibility of dozens more being called to the stand by the prosecution.

Because serrano was a minor at the time of the crime, he is not eligible for the death penalty.

If he's convicted, he could face life in prison.

By David Hamilton, WCJB TV20 News