ABC News Correspondent

Jason said he went to serve as lookout so Zach could shoot her.

Jason said he went to serve as lookout so Zach could shoot her.

Jason testified it was silent at first, but then they heard a boat coming down the river, panicked, and put Holly back in the car. Jason said Zach dropped him off at his car, and then the two didn't meet again until the afternoon. He said Zach later told him that he, his brother, and Shane Austin had kidnapped and raped Holly and that Zach had disposed of her body.

Jason testified it was silent at first, but then they heard a boat coming down the river, panicked, and put Holly back in the car. Jason said Zach dropped him off at his car, and then the two didn't meet again until the afternoon. He said Zach later told him that he, his brother, and Shane Austin had kidnapped and raped Holly and that Zach had disposed of her body.

Jason Autry's hours on the stand were full of colorful, shocking details. When Jennifer Thompson cross-examined Jason, She questioned his credibility. She asked him about his past statements, denying he had anything to do with Holly's kidnapping and murder.

Jason Autry's hours on the stand were full of colorful, shocking details. When Jennifer Thompson cross-examined Jason, She questioned his credibility. She asked him about his past statements, denying he had anything to do with Holly's kidnapping and murder.

Thompson pointed out that at the time Autry says the murder happened, he was on phone calls with his girlfriend and also his mother.

Thompson pointed out that at the time Autry says the murder happened, he was on phone calls with his girlfriend and also his mother.

Thompson also asked Jason if he was benefiting from testifying, possibly getting a reduction in his sentence for a federal gun charge.

Thompson also asked Jason if he was benefiting from testifying, possibly getting a reduction in his sentence for a federal gun charge.

She also emphasized that if Zach was guilty, Jason was not some innocent bystander.

She also emphasized that if Zach was guilty, Jason was not some innocent bystander.

Jason's time on the stand went into the evening hours, and when the cross-examination was over, the judge dismissed everyone for the day. The prosecution's star witness had spoken, but there were still many days of testimony left. Key pieces of the investigation came up, and key names testified.

Jason's time on the stand went into the evening hours, and when the cross-examination was over, the judge dismissed everyone for the day. The prosecution's star witness had spoken, but there were still many days of testimony left. Key pieces of the investigation came up, and key names testified.

To try to answer a big question in the case, prosecutors showed the jury the alleged murder weapon, a .32 caliber revolver that witnesses claimed was owned by Zach Adams' friend, Shane Austin. It was recovered in a drainage ditch just months before the trial. The prosecution and defense each called a cell phone expert to explain what the troves of phone data did and did not show.

To try to answer a big question in the case, prosecutors showed the jury the alleged murder weapon, a .32 caliber revolver that witnesses claimed was owned by Zach Adams' friend, Shane Austin. It was recovered in a drainage ditch just months before the trial. The prosecution and defense each called a cell phone expert to explain what the troves of phone data did and did not show.

Both experts agreed that Adams and the other suspects' phones did not hit cell towers near the Bobo home at the time Holly was taken. The prosecution expert said it was possible Holly and Zach Adams' phones were in the same general locations later that morning. But the defense expert disagreed.

Both experts agreed that Adams and the other suspects' phones did not hit cell towers near the Bobo home at the time Holly was taken. The prosecution expert said it was possible Holly and Zach Adams' phones were in the same general locations later that morning. But the defense expert disagreed.

The prosecution also called to the stand convicted sex offender Terry Britt, who was in prison for kidnapping and attempted rape. Prosecutor Jennifer Nichols tried once and for all to show he was not the man behind Holly's kidnapping and murder. Remember, Terry Britt said he had an alibi, and the investigation into him did not find evidence linking him to Holly.

The prosecution also called to the stand convicted sex offender Terry Britt, who was in prison for kidnapping and attempted rape. Prosecutor Jennifer Nichols tried once and for all to show he was not the man behind Holly's kidnapping and murder. Remember, Terry Britt said he had an alibi, and the investigation into him did not find evidence linking him to Holly.