Arguments between a husband and his wife ended late Saturday with the 41-year-old man shooting his young son and then fatally shooting himself, police said.
Police were not looking for any other suspects in the murder-suicide that occurred late Saturday in the 5900 block of Mimosa Lane in Rowlett. The city is about 52 miles northeast of Fort Worth.
Authorities had not released the names of the man or his 11-year-old son, but local news reports identified the father as Policarpo Gonzalez Flores and his son, James Gonzalez.
The shooting stemmed from marital problems.
"He (husband) and his wife had been arguing all day at the residence," Det. Cruz Hernandez said in a Sunday telephone interview. "She was going to leave him, and she eventually left the home."
At some point Saturday night, the husband called his wife.
"He told her 'I've killed my son. I'm going to kill myself,' " Hernandez said. Immediately, the wife called police. The boy was the woman's stepson.
Officers arrived shortly after 11 p.m. Saturday and found the man dead in the home. A handgun was located near him.
His son was found and rushed to Baylor Scott & White Medical Center-Lake Pointe, where he died. The boy was a student at Coyle Middle School in Rowlett in the Garland school district.
The father and his son were the only ones in the home at the time of the shooting.