TEXAS CITY, Texas -- A 70-year-old woman shot and killed her granddaughter's husband in self-defense during an argument at her home over the weekend, police told Local 2 Tuesday.

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Officers were called to the 2500 block of 37th Avenue North at 2:15 a.m. Saturday. Investigators said Steven Porres, 28, was shot once after he broke down the front door of his wife's grandmother's home. He lived there with his wife and their four children.

Porres and his wife apparently had a heated argument before he was asked to leave. A short time later, he returned and forced open the front door, according to police. The grandmother, identified as Concetta Capuano, then opened fire with her handgun, hitting Porres in the chest, officials said.

Porres collapsed on the front lawn. His children came out and screamed for their father to wake up, according to neighbors. He was taken to the Mainland Medical Center and was pronounced dead just after 3 a.m. Saturday.

Investigators said the case would be referred to a Galveston County grand jury without charges since it appeared to be self-defense.

"(We ruled it self-defense) from the totality of the circumstances -- what occurred prior to the shooting and the past history of the parties involved," said Sgt. Brian Goetschius with Texas City Police Department.

Porres had a criminal history with convictions of carrying a weapon illegally, theft, and assault of a family member.

Texas law states that when you're in your home and you feel your life or the life of another is threatened, you have a right to defend yourself with lethal force.