By LUKE WILUSZ
Chicago Sun-Times Wire

Devon Thomas | Cook County Sheriff’s Dept.
Four-month-old Janylah Mack died Thursday from injuries suffered in utero when her father allegedly beat her pregnant mother and killed her 3-year-old brother Tayveon J. Thomas.
Janylah was pronounced dead at 10:09 a.m. Thursday, according to the Cook County medical examiner’s office. An autopsy Friday found the baby, who lived in the West Side Humboldt Park neighborhood, died from complications of injuries her mother suffered in an assault while pregnant. Her death was ruled a homicide.
The Illinois Department of Children and Family Services is investigating her death, according to spokeswoman Veronica Resa.
A DCFS statement said Janylah died “as the result of injuries suffered in utero from an apparent domestic violence incident that took place when the mother was 34 weeks into her pregnancy, October 31, 2016.”
Her father, Devon Thomas, 22, was charged with murder and aggravated battery in November for an attack on his 3-year-old son Tayveon, and his then-pregnant mother, authorities said at the time.
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