( CNN ) -- A Texas man convicted in the shooting death of a 21-year-old man in 1992 was executed Tuesday in Huntsville , officials said . Marvin Wilson was pronounced dead at 6:27 p.m. ( 7:27 p.m . ET ) , the Texas Department of Criminal Justice said . Wilson 's IQ had been measured at 61 , according to the American Civil Liberties Union of Texas , which opposed the execution . In an online posting , the ACLU said Wilson , 54 , had been declared `` intellectually disabled '' by a court-appointed neuropsychologist . `` Despite all the signs of Mr. Wilson 's intellectual disabilities and the diagnosis of the court-appointed neuropsychologist , the District Court of Jefferson County ( Texas ) concluded that Mr. Wilson is not mentally retarded , '' the ACLU posting said , with `` not '' italicized for emphasis . Before he was put to death by injection , Wilson made a final statement in which he said , `` Ya 'll do understand that I came here a sinner and leaving a saint . Take me home , Jesus , take me home , Lord . '' Wilson was convicted in the shooting death of Jerry Robert Williams in Beaumont , Texas . According to the Texas Department of Criminal Justice , Williams was abducted and shot after a `` physical confrontation '' between the two men . More from CNN Justice . Army vet identified as shooting suspect . Loughner pleads guilty to 19 counts in Tucson , Arizona , mass shooting . NYPD to subpoena Twitter over theater threat . Police try to unravel mystery of man with huge stash of fake IDs .
Marvin Wilson was convicted of shooting to death a 21-year-old man in 1992 . Wilson had an IQ of 61 , according to the ACLU , which opposed the execution . The Supreme Court ruled that states could not execute people with intellectual disabilities unless they were deemed mentally competent by doctors and other experts.