Justin Ross Harris in court. (Kelly J. Huff/Marietta Daily Journal via Associated Press)

A former inmate who shared a cell with the man accused of leaving his son to die in a hot car says that Justin Ross Harris was emotionless after the ordeal.

Harris has been charged with the murder of his 22-month-old son, Jordan, who was left in the back seat for seven hours while Harris was at work. Georgia prosecutors had already raised the issue of Harris’s emotional state after the death last month.

Now, a man who was booked in a Cobb County jail at the same time as Harris has claimed to the National Enquirer that Harris chatted causally with other inmates and showed no signs of mourning his dead son.

“There was no emotion whatsoever in his voice, attitude – anything,” 21-year-old Mark Wilson told the Enquirer. “There was just no sadness in how he was acting.”

He added: “The first words out of his mouth were, ‘What’s up guys?’ as if nothing had happened.”

Wilson was in jail for a DUI infraction, he told the tabloid. According to WXIA-TV in Atlanta, Wilson is also on a contract with the Enquirer, which is known to pay its sources.

Testifying in preliminary hearings, Cobb County Police Detective Phil Stoddard claimed that Harris showed no emotion when interviewed by police about his son’s death. But a defense witness disagreed, according to the Associated Press, and Harris was seen crying in court.

According to testimony by Stoddard, on the day of the toddler’s death, witnesses heard “squealing tires” as Harris’s vehicle came to a stop. Harris got out of the car and yelled, “Oh, my God, what have I done?”

The tragic case has already become a national preoccupation, with both Harris and his wife, Leanna Harris, actively being tried in the court of public opinion.