Port St. Lucie police were called to a domestic dispute at a home in the 2200 block of Southwest Lawrence Street just after 4 p.m. Sunday.
Police spokesman Tom Nichols said Maignan shot his girlfriend in the back of the head, grazing her. Nichols said she grabbed a child who was inside the house and ran to a neighbor’s for help. The victim was treated and released from Lawnwood Regional Medical Center.
SWAT team members threw a telephone inside the house to try to get Maignan to talk. After he didn’t answer, tear gas was fired into the house.
When SWAT team members entered the house about five hours later, they found Maignan dead in a bedroom from a self-inflicted gunshot wound to the head, Nichols said. Nearby residents were forced to evacuate their homes during the standoff.
Nichols said police would speak with the victim to find out what led to the incident.