Investigator Mike Mayhew

Shelby said he had been gone for more than two hours, and when he got home, he was upset.

Shelby said he had been gone for more than two hours, and when he got home, he was upset.

Shelby said he had been gone for more than two hours, and when he got home, he was upset.

Shelby said she went to sleep around 9.30 and was awakened by her father around 2.45 a.m.,

Shelby said she went to sleep around 9.30 and was awakened by her father around 2.45 a.m.,

Shelby said she went to sleep around 9.30 and was awakened by her father around 2.45 a.m.,

Detectives went back to Tarr and told him Shelby's story did not match his. Tarr then changed his story and said he had gone to his friend's house twice, but still insisted he was home by 8. As Tarr sat at the police station, detectives searched his house and found his phone and a Glock pistol. Shelby had told them her father had a different gun, but they didn't find it.

Detectives went back to Tarr and told him Shelby's story did not match his. Tarr then changed his story and said he had gone to his friend's house twice, but still insisted he was home by 8. As Tarr sat at the police station, detectives searched his house and found his phone and a Glock pistol. Shelby had told them her father had a different gun, but they didn't find it.

Detectives went back to Tarr and told him Shelby's story did not match his. Tarr then changed his story and said he had gone to his friend's house twice, but still insisted he was home by 8. As Tarr sat at the police station, detectives searched his house and found his phone and a Glock pistol. Shelby had told them her father had a different gun, but they didn't find it.

Shelby told investigators she had seen it the day before Thanksgiving in her father's sock drawer.

Shelby told investigators she had seen it the day before Thanksgiving in her father's sock drawer.

Shelby told investigators she had seen it the day before Thanksgiving in her father's sock drawer.

Bobby Tarr sat at the police station overnight while authorities continued to investigate. They had already learned that his car had been captured by license plate reader cameras just after midnight the night of the shooting. The cameras were near a gas station, and investigators discovered that Tarr had bought gas there just after midnight.

Bobby Tarr sat at the police station overnight while authorities continued to investigate. They had already learned that his car had been captured by license plate reader cameras just after midnight the night of the shooting. The cameras were near a gas station, and investigators discovered that Tarr had bought gas there just after midnight.

Bobby Tarr sat at the police station overnight while authorities continued to investigate. They had already learned that his car had been captured by license plate reader cameras just after midnight the night of the shooting. The cameras were near a gas station, and investigators discovered that Tarr had bought gas there just after midnight.

Back at the police station, they confronted him with a gas station receipt.

Back at the police station, they confronted him with a gas station receipt.

Back at the police station, they confronted him with a gas station receipt.

The gas station was near Tarr's home, an hour from the crime scene. Andrew Affronti is the Montgomery County state's attorney. He has dystonia, a condition that causes muscle tics and tremors. So why is it significant? So he went out and got some gas.

The gas station was near Tarr's home, an hour from the crime scene. Andrew Affronti is the Montgomery County state's attorney. He has dystonia, a condition that causes muscle tics and tremors. So why is it significant? So he went out and got some gas.