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HANFORD — Ramiro Trevino Sr., the father of the man who killed himself after shooting his father and killing his off-duty officer friend, died from his injuries, according to an update from the Kings County Sheriff's office. 

"Ramiro Trevino Sr. succumbed to his injuries on Nov. 4," the press release stated.

Trevino Sr. had been shot by his son, Ramiro Trevino Jr., along with Lemoore police officer and family friend Jonathan Diaz as they attempted to intervene while Trevino Jr. fought with his girlfriend. The incident took place a little after 9 p.m. Saturday at a home on Eddy Street near Carolyn Avenue during a birthday party for Trevino's father.

Trevino Jr. shot and killed himself after shooting his father, 58, and Diaz, 32. Diaz died at the scene.

Sheriff’s Office Detectives report that as they investigated, they were able to recover audio and video from the home's surveillance camera. Based on that evidence and witness' statements, they conclude that the incident began as a domestic violence situation between Trevino Jr. and his girlfriend that "rapidly evolved into a murder/suicide," according to the press release.

Trevino Sr., Diaz and another family friend intervened in the dispute where the pregnant victim was being beaten and choked.

"Trevino Jr. also threatened to kill the victim during the assault," the press release stated. "They were able to get the victim out of the residence to safety. Immediately after, a gunshot was heard from inside."

The men ran back to check on Trevino Jr. to find he had armed himself with multiple firearms. They attempted to diffuse the situation, but Trevino Jr. then fatally shot Diaz and critically injured his father.

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Officials found an AR-15 rifle and two handguns at the scene, all of which were either registered to Trevino Jr. or department-issued.

Officials determined that Trevino Jr. had been drinking before the incident occurred, however they did not know how much alcohol he had consumed.

"The actions of Diaz, Trevino Sr. and a family friend were instrumental in saving the life of the victim and others who were departing the residence when Trevino Jr. opened fire," the press release stated.

Interim Police Chief Michael Kendall described Diaz as a highly motivated, self-motivated individual.

"He was extremely proactive on patrol. When he became a gang investigator, that was one of his goals in life. He got very involved with the community; he created the Youth Adult Awareness Program where he would take troubled, at-risk kids to the Coalinga prison in an attempt to get the kids back on the right path."

Diaz went to the police academy in 2013 and then became an officer at the Huron Police Department, Kendall said. He began his career with Lemoore Police Department in Aug. 2016.

In 2018, he was honored as the department's officer of the year and has also received four commendations during his time at the Lemoore Police Department.

"As a community, it’s very devastating to see something like this go on, especially involving two local peace officers," Kings County Sheriff Dave Robinson said in a press conference Sunday. "I do want to say that Jonathan Diaz and Ramiro Trevino Sr. were trying to do the right thing. Our hearts go out to the victims, the Lemoore Police Department and Ramiro Trevino Sr.’s family for what they are having to endure."

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