The State of Texas carried out the execution of Travis Mullis, 38, Tuesday evening in Huntsville. Mullis gave a final statement saying he was sorry for murdering his son and referring to his execution as a form of “assisted suicide.

Travis James Mullis was sentenced to death in 2011 for killing his 3-month-old son in Galveston. He is set to become the fourth person executed in Texas this year.

Travis Mullis was executed 16 years after killing his infant son and leaving the body on the side of Galveston's Seawall Boulevard.

Travis Mullis, 38, was condemned for stomping his son Alijah to death in January 2008. His execution by lethal injection was set to take place at the state penitentiary in Huntsville. Mullis would be the fourth inmate put to death this year in Texas,

Travis Mullis admitted to the killing in a written and videotaped confession. During his trial, defense attorneys asked jurors to consider a lesser offense for Mullis and focused on his history of mental illness that developed during his early childhood.

Travis Mullis was found guilty in 2011 of killing his 3-month-old son and leaving his body on Seawall Boulevard.