JACKSONVILLE, Fla. -- Prosecutors in the trial of a man on trial for manslaughter in the death of a 12-year-old boy for the first time gave details of how the boy died.

In opening statements Tuesday morning in the trial of Derrick Glover, prosecutors told the jury the defendant sold a rusty handgun to Tony Youmans for $50. From there, Youmans went with his best friend, Larry (LJ) Brown, to a wooded area near his house and was pretending to play a game of Russian roulette -- pointing the gun at his head and pulling the trigger -- but never expecting the gun to go off.

Prosecutors said the second time Youmans pulled the trigger, it fired.

The defense painted a very different picture, claiming Glover was a "patsy" for Youmans' friend and the other boy's 19-year-old brother -- the children of Glover's girlfriend. Defense lawyers also questioned whether Youmans himself pulled the trigger.

Youmans was reported missing on July 28, 2007 -- two days before his body was found about one mile from his house. Investigators had said he died of a gunshot wound to the head and had powder burns on his hand, but they never released information about how the shot was fired.

Glover has been held without bond since the day Youmans' body was found.

One of the first witnesses to testify was a missing-persons detective, who was told Youmans left Glover's house with the gun and three others.

"He said that Tony left with a white boy about the same age and a black boy, and they were all riding a bicycle," the detective testified.

Youmans' parents also testified in the morning, talking about the boy's disappearance and the discovery of his body.

"He had on, like two shirts. I know he had his black Heelys on, and I know when he walked out the door he said, 'I love you mom,' and he zipped up his zipper on his gray Dickies," testified Youmans' mother, Kelly Kidd.

The boy's father told the jury about the family's frantic search after the boy didn't return home.

"We started at Kelly's apartment, and then came across San Juan. As soon as we got across the road here, we walked at an angle and the officers started splitting up and going in different directions," he said.

Brown, the prosecution's key witness, is expected to take the stand Wednesday.

This is the first of two trials for Glover. This trial is for manslaughter and furnishing a firearm to a minor. He is set to be tried next week on two counts of possession of a firearm or concealed weapon by a juvenile.

A jury of six and two alternates were seated on Monday despite the defense's objection that pretrial publicity in the case would not allow a fair trial in Jacksonville.