OAK LAWN, IL — A former St. Rita of Cascia High School student is accused of stabbing his mother to death during an argument early Saturday morning in Oak Lawn. William Sink, 19, is charged with first-degree murder in the slaying of his mother.
Sink is currently hospitalized at Advocate Christ Medical Center where he is receiving psychiatric treatment. An Oak Lawn police detective was in court Monday filing a “no-body warrant.” Cook County Judge Patrick Rogers set bail at $2 million.
The prosecutor said Sink and his 50-year-old mother, Grace Sink, were having an argument around 3 a.m. Saturday, Oct. 22, in the family’s home in the 4600 block of West 106th Place. Sink was separated from his mother and went outside with his younger brother and their mother’s boyfriend.
When they were outside, Sink began fighting with his younger brother and mother’s boyfriend, allegedly knocking the man unconscious. Sink went back into the house where his brother saw him on top of his mother hitting her, the prosecutor said.
The brother was able to get Sink off their mother, and his brother left the room. Around 4:45 a.m., the boyfriend was asleep in the bedroom, when he was awakened by the sound of arguing between Sink and his mother, according to the prosecutor.