ABC News Correspondent

Zach's ex-girlfriend said yes and later admitted that she had previously told investigators she believed the scratches on Zach were from being chased by a police officer through the woods in an unrelated incident. Overall, a total of nine witnesses, including Zach's ex-girlfriend, testified that over the years, Zach, often while on drugs or in jail, made incriminating statements.

Zach's ex-girlfriend said yes and later admitted that she had previously told investigators she believed the scratches on Zach were from being chased by a police officer through the woods in an unrelated incident. Overall, a total of nine witnesses, including Zach's ex-girlfriend, testified that over the years, Zach, often while on drugs or in jail, made incriminating statements.

By the prosecutor's count, at least 10 were shared in court. They include statements like, I couldn't have picked a prettier It sure was fun. If he doesn't keep his mouth shut, I'm going to plant him next to that. And I'll kill you like I did Holly Bobo. One person testified that Zach asked if God would ever forgive him.

By the prosecutor's count, at least 10 were shared in court. They include statements like, I couldn't have picked a prettier It sure was fun. If he doesn't keep his mouth shut, I'm going to plant him next to that. And I'll kill you like I did Holly Bobo. One person testified that Zach asked if God would ever forgive him.

The first few days of the trial were all building towards the testimony of Jason Autry. He was about to take the stand and share what he claimed was an eyewitness account of Holly's murder.

The first few days of the trial were all building towards the testimony of Jason Autry. He was about to take the stand and share what he claimed was an eyewitness account of Holly's murder.

Jason Autry entered the Hardin County Courthouse wearing a white prison jumpsuit. He was now 44 and had gray hair, a gray beard, and reading glasses with him. He was charged with the murder, kidnapping, and rape of Holly Bobo. Jason's time on the stand would go on for nearly six hours. The weather had been warm during the whole trial, but on that particular day, it was hot.

Jason Autry entered the Hardin County Courthouse wearing a white prison jumpsuit. He was now 44 and had gray hair, a gray beard, and reading glasses with him. He was charged with the murder, kidnapping, and rape of Holly Bobo. Jason's time on the stand would go on for nearly six hours. The weather had been warm during the whole trial, but on that particular day, it was hot.

The high reached the mid-80s. The courtroom did not have air conditioning. And as it got hotter and hotter, people were sweating and fanning themselves trying to cool off. Most of Jason's testimony detailed everything he says he witnessed on April 13, 2011. Prosecutor Jennifer Nichols put Jason on the stand. Zach's defense attorney, Jennifer Thompson, cross-examined him.

The high reached the mid-80s. The courtroom did not have air conditioning. And as it got hotter and hotter, people were sweating and fanning themselves trying to cool off. Most of Jason's testimony detailed everything he says he witnessed on April 13, 2011. Prosecutor Jennifer Nichols put Jason on the stand. Zach's defense attorney, Jennifer Thompson, cross-examined him.

Jason said the morning of April 13th he wanted to buy morphine, so he called Shane Austin and Zach Adams. After 8 a.m., Zach called him back and said he needed Jason's help. He told Jason to meet him at Shane Austin's house. Jason said he assumed Zach needed help cooking meth.

Jason said the morning of April 13th he wanted to buy morphine, so he called Shane Austin and Zach Adams. After 8 a.m., Zach called him back and said he needed Jason's help. He told Jason to meet him at Shane Austin's house. Jason said he assumed Zach needed help cooking meth.

Jason said he bought a morphine pill, got high, and then Zach told him.

Jason said he bought a morphine pill, got high, and then Zach told him.

Jason said Zach told him it was Holly Bobo's body.

Jason said Zach told him it was Holly Bobo's body.

Jason testified that Zach drove the two of them to a spot under a bridge on the Tennessee River, not far from a boat marina, and backed his truck up to a pile of rocks. Jason said he and Zach then took Holly's body out of the car and put her on the rock pile.

Jason testified that Zach drove the two of them to a spot under a bridge on the Tennessee River, not far from a boat marina, and backed his truck up to a pile of rocks. Jason said he and Zach then took Holly's body out of the car and put her on the rock pile.

Jason spoke slowly, but he moved a lot on the stand. He made big hand gestures and even tried to act out the scenes he was describing. The courtroom was captivated.

Jason spoke slowly, but he moved a lot on the stand. He made big hand gestures and even tried to act out the scenes he was describing. The courtroom was captivated.