A Florida man stabbed his estranged wife to death and ran over her body with his car Sunday night before murdering his two young children and committing suicide as police closed in.

Henry Ramone Brown, 30, hid in the trunk of Chericia Brown’s car as she dined at a Chili’s restaurant in Lake Mary at around 10 p.m., FOX35 reported. When Chericia, 31, exited the establishment, Henry emerged and stabbed her before running off.

As two passersby attempted to help Chericia, Henry returned in a car, running over his wife and hitting the two people trying to help her. Paramedics took Chericia to a hospital where she later died. One of the two Good Samaritans remained hospitalized on Monday with unspecified injuries. The other had been released.

After hitting Chericia, Brown again fled the Chili’s parking lot. This time he picked up his 4-year-old son and 1-year-old daughter from a babysitter’s apartment, before driving to Central Florida Regional Hospital, in a different vehicle, to try to find Chericia. There, he was confronted by police officers and Brown exchanged gunfire with authorities. No one was injured during the incident, officials said.

Police located Brown driving on I-4 just minutes later and used stop sticks to disable the vehicle. Inside the car, authorities found Brown and his two children dead. Officials believe Brown killed his son and daughter before committing suicide as officers surrounded him.

It was not clear how Brown killed the children, or how he killed himself.

Police were investigating the officer-involved shooting at the hospital, the Seminole County Sheriff’s Office said in a statement.