A Georgia man who killed his live-in girlfriend was executed Tuesday, the first inmate put to death since the U.S. Supreme Court upheld the constitutionality of lethal injections.

William Earl Lynd was pronounced dead at 7:51 p.m. EDT, Georgia Department of Corrections spokeswoman Mallie McCord told The Associated Press. It came less than an hour after the U.S. Supreme Court rejected efforts to block it.