Maria Rios, 16, and her baby son Ciaro are missing from Chicago's Southwest Side.
The 39-year-old was westbound in a Pontiac in the 5100 block of South Archer Avenue when he swerved and struck an oncoming BMW.
Three freshman at Curie Metropolitan High School were taken to hospitals Wednesday after eating marijuana-laced granola bars at the Southwest Side school.
Chicago Public Schools receives nearly three complaints per school day of sexual misconduct by adults against students.
The incidents happened in November and December, Chicago police said.