Daniel Joost was 18 years old and had autism. He was from Oak Forest, Illinois near Chicago. Daniel Joost and his mother Margaret O'Leary-Joost were discovered murdered in their home on February 8, 2016. Daniel's father, David Joost, allegedly was responsible for the homicides and was found in the garage having committed suicide. Daniel Joost is survived by a sister, Kathryn Joost, who was away at college during this tragic murder-suicide.
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