Two other shooting victims were taken to the hospital for medical treatment, Plano police officer David Tilley told USA TODAY.
"We’re looking into a motive," he said. The relationship between the victims and the shooter was not yet known, and all involved are believed to be adults, he said.
The Texas Ranger Division of the Texas Department of Public Safety was also on the scene of the investigation, said Tilley. The officer who shot the suspect was placed on administrative leave pending the investigation, which is protocol, he said.
The shooting happened shortly after 8 p.m. CT, Tilley said.
Crystal Sugg, who said she works nearby, told local reporters including WFAA-TV she saw a man and a woman arguing outside the home, which is in a suburb north of Dallas.
After the argument, the woman went back in, Sugg said, and the man followed with a gun drawn. Sugg then heard a multitude of shots from what she said sounded like an automatic weapon.