Release posted on 05-01-24 at 9:27 a.m.

St. Petersburg Police detectives arrested Gregory Shinn, DOB 1-9-76, for the 1st-degree murder of his domestic partner, 59-year-old Katrin Mari Simpson. Shinn's booking photo is attached. He was arrested yesterday evening.

At 11:27 p.m., February 20, 2024, Shinn called police to report he had found the body of his girlfriend hanging in their garage. He claimed she committed suicide.

Through the investigation, detectives determined there was a history of domestic violence and there were inconsistencies in Shinn's statements. Also, the victim, Katrin Mari Simpson, had injuries inconsistent with suicide by hanging.