An inmate was put to his death in the first US execution since the outbreak of the coronavirus pandemic.
Walter Barton, 64, was executed by lethal injection in Missouri for the murder of an elderly woman three decades ago.
He stabbed Gladys Kuehler, 81, more than 50 times in her Ozark home in the trailer park she managed.
Barton was executed on Tuesday for the 1991 murder.
In his final statement, he said: "I, Walter 'Arkie' Barton, am innocent and they are executing an innocent man!!"
He was pronounced dead at 6.10 p.m. local time (2310 GMT) at the Eastern Reception, Diagnostic and Correctional Center in Bonne Terre, Missouri, state corrections officials said.
Kuehler, an acquaintance of Barton, had planned to lend him $20 on the day of the murder, court documents showed.
After numerous changes of venue, two mistrials and two overturned convictions, Barton was found guilty of murder and sentenced to death in March 2006.
Since then, he filed several unsuccessful appeals in state and federal court.
Barton was the first inmate to be put to death in the United States in the last two months after US states halted 11 pending executions for various reasons, including five that were postponed by Texas due to the pandemic, according to the Death Penalty Information Center.
Alabama carried out the country's last execution when it put to death Nathaniel Woods on March 5, about two weeks before many governors issued stay-at-home orders.
Barton was the first inmate executed in Missouri in 2020 and the sixth in the United States this year.
The next execution is scheduled to take place in Texas on June 16.
