Police say Lindsay Johnson's phone's search history contradicts her claims she didn't realize she was pregnant

University of Illinois Sophomore Charged with Murder of Newborn Found in Her Backpack

On Monday, nearly one month after police say they found a dead baby in her backpack, prosecutors filed murder and child endangerment charges against a 20-year-old University of Illinois student, PEOPLE confirms.

A police source tells PEOPLE that Lindsay Johnson, a 20-year-old sophomore from Monee, Illinois, stands accused of suffocating her newborn boy moments after giving birth in her dormitory’s bathroom. Johnson has since been freed on $75,000 bond, police say.

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Campus police were dispatched to Johnson’s dorm March 13 when fellow students reported moans and groans coming from the bathroom. Officers spoke to Johnson, who allegedly told them she was suffering from a stomach flu.

The campus cops returned two hours later after receiving calls about a baby’s cries coming from the bathroom, a police statement says.

Johnson had allegedly left by the time officers arrived to find blood on the bathroom’s tiled floor, according to the statement from investigators.

Police caught up with Johnson moments later as she was walking near the school’s Music Building. Inside her backpack, they allegedly found a deceased newborn.

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Officers say Johnson told them the baby was stillborn, but later allegedly confessed the child was alive and she used a towel to try to silence him.

Johnson, a sophomore studying agricultural communications, allegedly told detectives she was unaware she’s was pregnant until she started delivering the child.

However, a statement from police says a forensic analysis of Johnson’s phone “shows a history going back to September 2015 of searches made for information on pregnancy, pregnancy symptoms, miscarriage, home abortions, and how to manage physical signs of pregnancy after the loss of a baby.”

Tony Bruno, one of Johnson’s attorneys, tells PEOPLE the allegations against his client are “serious and tragic.”

“We are still awaiting the first piece of evidence from the state,” Bruno says. “It would be premature to comment much more about the case at this point without having seen any of the state’s evidence.”