Mark Hruska, a 35-year-old regional sales manager from Charles City, was found dead in his Des Moines home on March 1, 2015, the victim of multiple gunshot wounds. Neighbors and investigators focused on the next-door resident, Patrick William Kirwan, then 31, an Army veteran who had served in Iraq and who reportedly suffered from post-traumatic stress disorder.

Prosecutors say Kirwan developed a paranoid belief that Hruska was an FBI agent and suspected, without presented evidence, that Hruska was having an affair with Kirwan’s girlfriend, Jennifer Kizer. On the day of the killing Kirwan went to Hruska’s home and shot him multiple times with a Glock .40 caliber pistol. After the shooting Kirwan returned home, showered, visited a grocery store, and later confessed to Kizer’s mother, who called 911; Kirwan surrendered to police and admitted the shooting.

Kirwan was arrested and charged with first-degree murder. At his April 2016 trial his attorneys raised insanity, diminished responsibility, and justification defenses tied in part to PTSD from military service. The jury convicted him of second-degree murder and he was sentenced. Does anyone have additional details about Hruska’s life or the neighborhood that could shed light on what happened?