Harris' son died last Wednesday after he was left in a hot car for seven hours. Harris told authorities that he forgot to drop off his son at daycare, went to work, and only realized what had happened when he was on his way home.
Police arrested him on charges of murder and cruelty to children.
But a new arrest warrant, filed Wednesday, casts doubt on Harris' original report.
The warrant claims that Harris actually went to his car at lunch, opened the driver's side door and put an object into the car.
Cobb law enforcement source: Work computer for Dad who left child in car shows search for how long it takes to kill animal in hot car.— Randy Travis (@RandyTravisFox5) June 25, 2014