Former San Francisco 49er Jason Hairston was found dead in his California home this week.

The former NFL linebacker, who joined Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE on a hunting trips just weeks ago, was confirmed dead by his hunting gear company, KUIU, on Wednesday.

“We are shocked and saddened to announce the tragic passing of KUIU founder Jason Hairston. His legacy lives on in KUIU’s spirit of relentless innovation,” the company said on Twitter.

The company later revealed on its website that Hairston took his own life.

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“He is survived by his wife Kirstyn and 2 children,” KUIU wrote. “The family has requested that donations be made to support CTE-related research at the Boston University Concussion Legacy Foundation in lieu of sending flowers.”

Trump Jr. also took to Instagram to express condolences for his friend shortly after his passing, calling Hairston “an inspiration to all outdoorsmen and women for generations to come.”

“Jason, I have no words. I will always remember our adventures and sharing a campfire with you. They will be some of my fondest experiences in the outdoors,” Trump Jr. said in his post. “You were and will continue to be an inspiration to all outdoorsmen and women for generations to come. Thanks for the friendship and the memories buddy. I’m going to miss you. R.I.P.”

According the KUIU website, the former NFL player was raised in Orange County, Calif., before he went on to play for the San Francisco 49ers and Denver Broncos. He later retired before the age of 24 due to problems with his neck.

He also had a history of speaking about chronic traumatic encephalopathy (CTE), a degenerative brain disease found in athletes, veterans and others with a history of repetitive brain trauma.

Hairston was 47 years old.