Chicago girl wraps newborn boy in bag and leaves him outside to die: police Ana Rosa Mora, 18, was concerned her boyfriend would leave her since her newborn looked like her ex-boyfriend who was the father. A construction worker found the child a few hours after she left the child outside and then went back to bed. Chicago Police Department Prosecutors said Ana Rosa Mora, who faces a first-degree murder charge, after she allegedly killed her baby out of fear her boyfriend would leave her. An 18-year-old Chicago girl wrapped her newborn in a bag and left him outside to die because she feared the child looked like her ex-boyfriend and her current beau would leave her, authorities said. Ana Rosa Mora, 18, is facing charges of first-degree murder following the senseless action, reports the Chicago Tribune. The mother gave birth over the weekend and came to school Monday after allegedly committing the act â€” even showing staff members pictures of a newborn girl that she downloaded from the Internet, authorities said. But after employees noticed strange behavior â€” such as the girl asking if authorities could link her to the child through DNA and lying about the baby's age â€” they alerted authorities, the newspaper reported. The child had been found by a construction worker a few hours after the child was left outside, authorities said. The boy was born alive but died of asphyxia and possible exposure, authorities said. The new mother said her ex-boyfriend was the father and when the child was born she feared her current boyfriend would notice and leave her, the newspaper reported. She was arrested Friday. Mora, who was scheduled to graduate from high school in June and attend college in the fall is now being held on $500,000 bail, the newspaper reported.