A Texas man got the shock of his life when he learned on Facebook that his father allegedly shot his mom and brother, and then killed himself.

James Jacobson told ABC 13 that he woke up around 2:50 a.m. Friday to go to work, logged into Facebook and saw several posts about the Tomball home where he grew up.

Panicked, he raced to the home, arriving about an hour after police left.

Authorities first showed up at the scene around 10 p.m. Thursday after several neighbors called 911 saying they heard shots fired, the outlet reported.

Harris County SWAT officers surrounded the home and found the body of Jeril Jacobson — who James said is was in his early 50s — on the front lawn. It wasn’t immediately clear whether Jeril’s death was a suicide or someone else shot him.

Meanwhile, James’ brother Chris Jacobson, 33 — who was bleeding profusely from his leg and stomach — ran across the street to neighbor Michael Baker’s home for help, the station reported.

“When he fell into my arms, Chris said, ‘I’m shot! Dad shot me! I’m not going to make it!’,” the good Samaritan told the outlet.

So Baker, a Navy veteran who served as a hospital corpsman, cinched a leather belt around Chris’ leg.

“I was just trying to keep him with me,” Baker said. “Chris, stay with me. Chris stay with me. We are working on it. We are going to get you some help, stay with me.'”

And Kathy Jacobson, who had reportedly been shot once, was crouching under a parked pick-up, yelling she had been shot, Baker recalled to the station.

She was taken to a local hospital where she immediately underwent surgery and is recovering.

Chris was flown to the hospital, where he is conscious and also recovering, James said.

“My father may have been depressed and not very social,” he told the station. “My brother and dad, they just clashed a lot.”