'Oh God, We Better Call': 911 Call in Oak Forest Double Murder-Suicide

Audio of the 911 call urging police to visit a family’s Oak Forest home reveals a coworker concerned over what “looks like it could be oil or blood” trickling out of the garage of where police later discovered a double murder-suicide.

“”We were like, ‘Oh, God! We better call,’” the caller told the dispatcher.

Police arriving to the scene of 6600 Courtney Drive found David Joost, 54, who they determined strangled his wife Margaret O’Leary-Joost, 55, and their 18-year-old autistic son Daniel in their beds, before killing himself in the garage.

O’Leary-Joost’s coworkers visited the home Tuesday, worried that she hadn’t shown up for work Monday or the past Friday. David Joost turned to desperate measures after losing a job. He had recently started his own business, House of David, providing pop/rock music from the 1960s to present day. Prior to that, he worked in sales and marketing for 30 years, according to his LinkedIn profile. Police said he had recently lost a job in Orland Park. He lists a position as general manager of a software company as his most recent work.

Joost also was a singer and musician who played local gigs and sang at Zion Lutheran Church in Tinley Park. Pastor Rev. David Peters recalled Joost as a ”happy person” who freely and passionately contributed his talents to the community.

“Dave was a happy person to help facilitate whatever was taking place, not just for Daniel, but for others in the group,” Peters told Patch, “... which almost makes this all the more confusing and disturbing. Someone doing so much positive, it doesn’t make sense.

The couple has one remaining daughter, 20-year-old Kathryn or “Katie”, who was away at Millikin University when the killings occurred. The community was spurred to action by the devastating loss, with friends generating a GoFundMe in her name. It has raised $43,000 as of Friday afternoon.