A Kansas jury will decide whether to recommend a death sentence for a man convicted of killing his estranged wife and three other family members.

Attorneys for 48-year-old James Kraig Kahler couldn’t persuade jurors that he was too mentally ill to be held legally responsible. Kahler’s wife was having a lesbian affair and pursuing a divorce at the time of the November 2009 shootings, about 20 miles south of Topeka.

Kansas has an unusual standard for determining when mental illness allows a defendant’s acquittal, and it’s likely to be challenged on appeal.

The jury will decide this week whether he should be executed or serve life in prison.

Kahler was a city utilities director in Texas and Missouri before moving back to Kansas weeks before the killings.