On Aug. 13, 2018, Colorado native Chris Watts murdered his pregnant wife Shanann and their two children, Bella, 4, and Celeste, 3. He then buried his wife and hid the bodies of his children at an oil site that he was familiar with due to his line of work. He was ultimately found guilty of the crimes and is currently serving five consecutive life sentences at a Wisconsin prison without the possibility of parole.

According to People, Watts, now 34, has started to take a bit of ownership for the events and reportedly feels guilty for his actions.

"He thinks about what he did every day. He is tormented by his past and the mistakes he made," a source familiar with Watts revealed to the publication. They stated that "he has nothing to do but think" in prison, which may have led to his change of heart.

READ: Chris Watts Update: Investigator, Detective Discuss Dealing With Trauma A Year Later

At the time of the murders, Watts was having an affair with a co-worker named Nichol Kessinger. During the investigation, she stated that she had been made to believe that he had been separated from his wife during their affair. Watts would later go on to blame Kessinger for the murders.

The Watts source added that he has a long road ahead as he is "left alone with his thoughts for 24 hours a day, 7 days a week. Every day. Birthdays. Holidays. Special occasions. He's there in jail, in his cell, thinking about what happened. He's in his own private hell."

However, according to recent reports, Watts is able to occupy himself in other ways while serving his sentence. A source shared on HLN's docu-series "Lies, Crimes, & Video" in July that the murderer sees multiple "female admirers" visit him in prison.

Chris Watts
Chris Watts in court for his arraignment hearing at the Weld County Courthouse in Greeley, Colorado, on Aug. 21, 2018. Getty Images/RJ Sangosti