A 9-year-old boy and 5-year-old girl shot dead in Texas on Saturday were the apparent victims of a murder-suicide carried out by their father, PEOPLE confirms.
“The investigation is still ongoing,” North Richland Hills police spokeswoman Carissa Katekaru tells PEOPLE. “Detectives are still interviewing family and trying to piece together what led to this.”
On Tuesday, the young victims were identified as Luke Dawson, 9, and his 5-year-old sister, Bree Dawson.
“Initial investigation revealed the father shot the children and then shot himself,” police said in a statement.
The children’s mother, Rachel Dawson, called police shortly after 7 a.m. on Saturday when she found the siblings and her husband, Chris Dawson, dead at their home, authorities said.
The kids were killed with a shotgun, according to the Fort Worth Star-Telegram.
One of Rachel’s former neighbors and friends, Ariel Borg, said there were “warning signs, but I don’t think anyone could have guessed that this would have happened,” according to TV station KPNX in Phoenix, where the Dawsons lived with their children before a recent move to the suburbs of Fort Worth.
“He was very, very controlling of Rachel, to the extent that after a certain point, he no longer allowed her to be friends with us,” Borg told KPNX of Chris, who had reportedly worked as a surgeon.
“We saw warning signs, but it’s hard to know when to step in,” Borg said. “I just feel like we should have done more.”