Sunset Hills police are handling the deaths of Wayne Bales and Monique Martin as a murder-suicide.

Bales, 73, and Martin, 72, shared a home 27 Maclane Court, a quiet cul-de-sac in Sunset Hills near Laumeier Sculpture Park. The couple had been living together for 30 years, but were unmarried.

According to a report from the St. Louis Post-Dispatch Martin had been suffering from depression and recently tested for Alzheimer’s disease. Family members did not know what the results of the test had been.

A report from the Sunset Hills Police said they responded to the call in the early morning hours of October 28. They found Bales and Martin in an upstairs bedroom, each with a single gunshot wound to the head.

“Based on evidence at the scene, we believe the female resident apparently shot the male resident and then shot herself,” said the report. Police chief William LaGrand told Fox 2 News that Bales had been found in bed, while Martin was on the floor.

The couple was discovered after they failed to meet friends at the airport for a Caribbean cruise Sunday, according to the Post-Dispatch. The friends called a relative to check on the couple, who discovered the bodies and called police.

Bales owned a small car lot in Fenton, Bales Auto Sales, located at the corner of Gravois and Ferry Street for over 50 years. An employee at the car lot would not comment on the owner’s death.