'Hot Car Death' Dad Lead Disgusting Secret 'Double Life' Before Murder

Justin Ross Harris is on trial for killing his baby son by leaving him a hot car in Atlanta, Georgia and the prosecutor gave details about the shocking evidence he was going to present against the father. Click through the gallery to find out how the vicious murder will be presented in the heartbreaking case.

Ross Harris claimed that he forgot his young son was in the car, but the prosecutor claimed he was sexting with an underage girl. 'On that day, when his son was cooking to death, he was texting with a 16-year-old girl, trying to get photos of her vaginal area," Boring told the jury. "He closed the door on his 22-month-old son's life and sought another life. Minutes before he closed the door on that child, while that child sat in the car, evidence will show that this defendant had been online and exchanged comments that he'd been unhappy in his marriage."

While Ross Harris was planning to present the defense that he forgot his son in the car, the prosecutor told the jurors about his raunchy secrets. "It's about deception, of family and friends, deception with law enforcement, deception in every part of this case. A double life."

The prosecutor also told the jury about Ross Harris' suspicious behavior after he discovered his baby's body. "Harris pulled into a shopping center after leaving work and began shouting, 'What have I done? What have I done?' His behavior was not consistent with somebody who had just discovered his child in the back seat after forgetting him."

Boring questioned the actions of a father finding his child dead. "Did he cry, 'Somebody call 911, somebody come help my child?' No. While other people were trying to help his son, he was walking around. He starts trying to call his wife, and trying to call the daycare. He doesn't call 911 and separates himself from his child. No tears."