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DALLAS (CBS/KTVT) A shootout late Sunday in the Dallas suburb of Lancaster left three people dead, including the 27-year-old son of Dallas Police Chief David Brown, according to CBS affiliate KTVT.

The other victims in the shooting were 37-year-old Lancaster police officer Craig Shaw and the 23-year-old shooting suspect, identified as Jeremy McMillian.

Shaw was responding to a call about a domestic disturbance with shots fired at an apartment complex around 6 p.m. on Sunday. According to Lancaster Police Chief Keith Humphrey, when police arrived on the scene, the suspect opened fire and struck Shaw. He shot back and struck the suspect.

At a Sunday night press conference, the First Assistant Chief of the Dallas Police Department, Charles Cato, confirmed that David O'Neal Brown Jr. was also killed in the incident, although the circumstances weren't clear. He is the son of the department's new chief, David Brown. Cato did not specify whether Brown Jr. was killed before or after the other officer opened fire. It is not known if Brown Jr., listed as a resident of the apartment complex, is considered a suspect in this case, or simply an innocent bystander.

Yeah, maybe he was an "innocent bystander".

Dallas Police Chief David Brown (CBS/KTVT)