TOPEKA, Kansas (AP) — The Kansas Supreme Court is considering the appeal of a man sentenced to die over the killings of a Great Bend couple in 2004.

The justices were hearing arguments Friday in the case of Sidney Gleason. He is challenging his convictions for capital murder and other crimes and his death sentence.

The murder victims were Miki Martinez and boyfriend Darren Wornkey. Their deaths were days after the robbery of a 76-year-old man in February 2004.

Prosecutors say Gleason and cousin Damien Thompson worried about what Martinez would tell police about the robbery.

Workney was shot while he sat in his Jeep outside his home. Martinez was taken to a rural area and strangled and shot.

Thompson avoided the death penalty by pleading guilty to Martinez’s murder.