What We Know About the Ph.D. Student Accused of Killing a Friend’s Baby

In June, UC San Diego grad student Nicole Virzi was babysitting one of her friend’s 6-week-old twins when she called 911. She told police that the baby, Leon Katz, had fallen from his bassinet and bumped his head. Leon was rushed to the hospital and later pronounced dead. Virzi maintains that the incident was an accident, but the next day, she was charged with homicide and aggravated assault. Prosecutors believe Virzi is also responsible for injuries sustained by Leon’s twin brother, Ari.