A Texas man, Mario Swain, who was convicted of the murder of Lola Nixon was executed Thursday evening through lethal injection in Huntsville, Texas. Swain was pronounced dead at 6:39 pm CST.

In 2002, Swain murdered 44-year-old Nixon after burglarizing her house in Longview, a town in East Texas, just two days after Christmas. According to reports, Swain led police to her body, which was in the trunk of her car, an autopsy revealed that Nixon had been beaten, stabbed and strangled before he put her in the trunk of her own car. She was still alive when he put her in the trunk.

James Volberding, the attorney of 33-year-old Swain, mentioned that "no attempts were made in court to block the execution," as reported by the Associated Press.

There is no evidence suggesting if Swain knew Nixon or if the burglary was a random act of violence.

Prosecutor, Lance Larson said Swain was a "serial killer in training," Larson continued, "A girlfriend told us he kept a list in notebooks of names and license plates of girls he would follow...I think he was working up to something," as reported by the Associated Press.

Swain became the 13^th inmate to be executed in 2012 in the state of Texas and the 37^th inmate to be executed in the country this year. No one from the Nixon family was present at the execution.

Texas in one of the 33 states in the U.S. where capital punishment is legal.