Sheriff Ed Gonzalez says they are treating the incident as a double murder-suicide.
"Family issues will be part of our background investigation," he said. "It's standard procedure to investigate everyone. If there's some information about any conflict that will be important to know."
Authorities said they received a call around 3:50 a.m. from Reyna Isabel Perez, who claimed she could not find her family.
When deputies arrived, they searched the house and found the bodies of 14-year-old Maria Perez and 15-year-old Isabella Perez, as well as their stepfather Victor Portillo in a bedroom on the second floor of the home.
"These situations are always very traumatic," Gonzalez said. "The loss of three lives is so unique. It doesn't happen all the time. Our hearts go out."
@HCSOTexas deputies responded to 3800 Silverhawk Drive, where they found an adult male and two teenage females deceased from apparent gunshot wounds. Our Homicide and Crime Scene Units are enroute now. PIO and I are headed to the scene. #HouNews pic.twitter.com/u8fXgKkejj— Ed Gonzalez (@SheriffEd_HCSO) November 4, 2018
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