A shooting that left a first responder critically injured and two dead, including the shooter, began as an argument between Dallas neighbors.
The Texas shooting that left a paramedic critically injured and two others dead began as an argument between the suspect and the first shooting victim, who were neighbors, cops said late Monday.
In the tense moments following the initial shooting, an EMT who responded to the scene was critically injured when cops say the suspect opened fire on paramedics tending to the wounded neighbor.
Read: Army Veteran Tied Service Dog to Tree, Shot It 5 Times on Camera: Cops
The injured paramedic is out of surgery and remains in intensive care, but may have to undergo additional surgeries, authorities said.
The wounded neighbor is also in the ICU.
With the community on lockdown following the late morning shooting, police went door-to-door in search of the suspect.
The gunman, identified by WFAA as 36-year-old Derick Lamont Brown, holed himself up in a house where investigators believe he fatally shot a person before killing himself.
Read: Hear the Chilling 911 Calls After Shooting of Beloved Grandfather on Facebook Video
The two bodies were discovered by a police robot, authorities said early Monday evening.
Family members reportedly told the station Brown is the father of 18 children and worked as a janitor at an area hospital.
The victims have not yet been identified.
Watch: Cop Charged for Shooting Therapist Who Was Consoling Man With Autism in Street