The gunman who allegedly killed three at Chicago’s Mercy Hospital is identified as 32-year-old Juan Lopez.
Lopez died during a shootout with police, and it is not yet known whether he was killed by an officer’s bullet or a self-inflicted gunshot.
ABC 7 reports the incident unfolded outside the hospital when Lopez and Dr. Tamara E. O’Neal got into an argument in the parking lot. O’Neal “had recently broken off an engagement” with Lopez, and during the argument, Lopez allegedly pulled out a gun and shot O’Neal, killing her.