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OAK FOREST, Ill. -- Three family members were found dead in their Oak Forest home in an apparent murder-suicide, according to police.

The bodies of David Joost, 54, Margaret O'Leary Joost, 55, and Daniel Joost, 18, were found in a house in the 6600 block of Courtney Avenue at about 8 p.m. Monday.

Police were making a well-being check when they found the bodies Monday night. The husband, David, is believed to have killed his wife and son, who had autism, before taking his own life.

Police say they found O'Leary-Joost and Daniel Joost unresponsive in their beds. David Joost was found in the garage with his wrists cuts and a car left running.

There is still no time frame of when the murders may have happened.

The causes of their deaths have not officially been determined, police said.

The couple also had an older daughter, 20, in college and she has been notified of their deaths.

An autopsy is expected to be done on the bodies.

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