Tanner says the man discovered the bodies of Israel Alvarez and Guadalupe Ronquillo-Ovalle with their children on Sunday night. A rifle was recovered from the home near Rice, 40 miles southeast of Dallas.
The children were aged 10, 8 and 4, and their parents were both 33-years-old.
Records show Alvarez was arrested Sept. 11 on a misdemeanor family violence charge. He was accused of shoving his wife and taking her phone because he thought she talked to another man. Alvarez pleaded no contest, paid a $367 fine and was freed.