Doyle Skillern was executed in 1985 in Texas under the Law of Parties.
He was an accomplice in the murder of an undercover narcotics agent. He was waiting in a car nearby when the murder happened. The shooter is serving a life sentence, but eligible for parole. ("Killers' Fates Diverged; Accomplice Is Executed; Triggerman Faces Parole," Washington Post, January 16, 1985)