Porter said the woman made the check because she had not received an answer from her brother after several phone calls.
Investigators found several shell casings at the scene and are speaking with family and friends in the hope of developing leads.
Porter is asking anyone who has information about the crime to call Crime Stoppers at 222-STOP (7867) or log onto miamivalleycrimestoppers.com to leave information.
Anyone who contacts police can remain anonymous.
Trotwood police are investigating a homicide at a home in the 3600 block Brumbaugh Boulevard, a spokesman said Thursday afternoon. The Montgomery County coroner is at the scene, so are several police officers, and the home is surrounded by crime tape.
Two people, possibly relatives of the victim, at the house who passed out were transported to a hospital.
We have a team of reporters at the location, and we’ll bring you the latest information as it becomes available.