Garrison Brown’s cause of death has been revealed. The “Sister Wives” star’s manner of death has been ruled a suicide, per People.

The Coconino County Medical Examiner in Flagstaff, Arizona, confirmed that Brown died of a gunshot wound to the head. A contributing factor in his death was alcohol poisoning.

Garrison, whose real name was Robert Brown, was the son of Kody Brown, 55, and his wife, Janelle Brown, 54. He died at age 25 in March.

The TLC reality show, which has aired since 2010, follows the polygamist Brown family: husband Kody, his wives Meri, Janelle, Christine and Robyn and their 18 children.

Shortly after his death, Janelle revealed that her son had recently sent some other people alarming texts, prompting her to send another of her kids, Gabe, 22, to check on him.

Authorities told The Post that it was Gabe who found Garrison.

Janelle and Kody publicly separated in December 2022. The exes are also parents of five other children and grandparents of three.

“Kody and I are deeply saddened to announce the loss of our beautiful boy Robert Garrison Brown,” Janelle and Kody posted on their separate Instagram accounts after TMZ broke the news of his death.

“He was a bright spot in the lives of all who knew him. His loss will leave such a big hole in our lives that it takes our breath away. We ask that you please respect our privacy and join us in honoring his memory,” they said.

Christine Brown, who shares six children with Kody — the pair announced their divorce in November 2021 after 27 years of spiritual marriage — also addressed the tragedy.

“Garrison was a wonderful, caring brother who understood Truely’s need for a hobby and built her a flowerbed,” Christine posted via Instagram. She shared a video of Garrison working with her youngest daughter, Truely, 13, at their house.

“We’ll miss him forever,” she wrote in a tribute after Garrison’s death.