Died: February 8, 2016.
Age at death: 18.
Cause of death: Multiple murder-suicide (Strangled).
Location: Chicago, Illinois, USA.
18-year-old Daniel attended a transitional program through his school.
Daniel and his mother, 55-year-old Margaret O'Leary-Joost, were strangled to death by Daniel's father, who then took his own life.
Daniel's 20-year-old sister Kathryn lived because she was away at college. Her community is raising money to help her stay in school.
Parents and Teen-Aged Son Dead in Oak Forest Double Murder-Suicide
'Oh God, We Better Call': 911 Call in Oak Forest Double Murder-Suicide
Support for Katie Joost