An autopsy showed Mark suffered a gunshot wound to her chest and Angerhofer was shot in the face and neck. They died in Mark's fourth-floor apartment at the Holmes Park Village apartments for seniors and disabled adults on Second Avenue SE.
According to the search warrant application, after the shooting, Vessel told authorities he was listening to music in his apartment and that he didn't hear anything.
The search warrant application said a witness told police they heard the gunshots and initially thought Vessel had committed suicide. The witness also told police that Vessel had been violent in the past and threatened to kill people when he drank or did not take his medication.
Another neighbor told police that Vessel was a former Marine and had PTSD and "other violent mental issues," according to the search warrant application.
According to the search warrant, authorities took ammunition, clothing and a cell phone into custody after serving the search warrant.