(KTRS ) The Missouri Supreme Court has set a May execution date for a man convicted of killing a deputy and two other people 13 years ago.

The court issued a warrant of execution for 66-year-old Earl Forrest. His execution on May 11 would be the first of 2016.

Forrest was convicted of killing Harriett Smith, Michael Wells and Dent County Deputy JoAnn Barnes in December 2002. Smith was killed at her Salem home in a drug dispute, and Wells was visiting her. Barnes died in a shootout when officers went to Forrest’s home to investigate the killings.

Missouri executed 10 men in 2014 and 6 in 2015.