A Texas man confessed to killing his ex-girlfriend in a cold case originally featured on TNT's " Cold Justice."
Ronnie Joe Hendrick, 42, pleaded guilty on September 10 to the murder of Pamela Shelly and will serve 22 years in prison, according to the Victoria Advocate. The newspaper also reports he signed a confession as part of the plea documents.
READ MORE: Catch up on the Pamela Shelly case
Shelly, 31, was found dead of a gunshot wound in her Cuero, Texas, home in 2001. Shelly's death was originally ruled a suicide, but the case was re-opened seven years later by DeWitt County Sheriff investigator Sgt. Carl Bowen.
"When I created the investigator's position and Carl moved in there, he told me he had been at the scene of that case and wanted to take a closer look at it. Some things just didn't seem right to him," Sheriff Jode Zavesky told the Victoria Advocate.
"Cold Justice" airs at 10 p.m. ET Tuesdays on TNT, which is owned by the same parent company as HLN.