Around 9:45 a.m., police received a call about a gunshot that came from inside the home where the couple and their children live. No one was home when officers responded to the home.
Salinas showed up a short time later, with blood on his clothes and boots, the Daily News reported.
He told the officers his son had found the AK-47 and fired it, killing Snowflake, the family’s cat, the police complaint said. A family friend who was at the house when the cat died, however, told investigators that Salinas had stabbed the cat and threw the animal’s body away in an alley.
When the cat’s body was found by animal control officers two days later, a veterinarian who examined the feline found 12 stab wounds, police officials said.
Investigators said in the criminal complaint that Salinas got several guns out of a safe and placed them on a bed during the argument with his girlfriend. The guns were left out after she left for work.
The couple's son later climbed onto the bed and fired the loaded rifle, sending a bullet through a dresser and out the back wall of the home, the Daily News reported. No one was injured by the gunshot.
Police and Texas Child Protective Services workers were still investigating the incident Friday, the newspaper reported.
Salinas remained in custody Tuesday. His bail had been set at $47,500, but jail records showed he was also being held on an emergency protective order.