The execution Steven Nelson for the 2011 murder of Rev. Clint Dobson is tonight. His wife and a death penalty activist will be witnesses.

Some 13 years after he was sentenced to death for the grisly murder of Texas Rev. Clint Dobson inside his church in 2011, Steven Nelson maintains his innocence and said the late pastor's church rejected his efforts to contact Dobson's family days before he is scheduled to die by lethal injection Wednesday.

Nelson, 37, was convicted of the 2011 murder of the Rev. Clint Dobson in a robbery that turned fatal inside Dobson's own church just west of Dallas.