'Sister Wives' star Janelle and Kody Brown's son Garrison Brown died at 25.

Janelle and Kody Brown's adult son, Garrison Brown, who appeared on "Sister Wives," was found dead at an Arizona house on Tuesday.

Flagstaff police believe he committed suicide. Police said Garrison's younger brother Gabe met them at the home after a death report. Police stated the death was under investigation and showed no foul play. "Sister Wives," an 18-season TLC reality show, follows Kody Brown, his four wives, and their 18 children. Despite having six children and three grandchildren with Janelle, he claims estrangement.

Janelle and Kody posted nearly identical Instagram statements on Garrison's death on Tuesday. "He was a bright spot in the lives of all who knew him," posters said. "Our loss will leave such a big hole in our lives, that it takes our breath away."

TLC stated: "Garrison Brown's death is heartbreaking. Our thoughts and prayers are with the Brown family during this terrible time."

His mother lauded Garrison's woodworking talents, a family characteristic, for restoring a vintage camping trailer and building a handmade table for her.

Season 18 aired last fall and covered Kody and his children's estrangement from Janelle.

In one episode, Garrison Brown said, "We've reached out and tried to be open and neglected and overlooked for offenses that were believed to have happened but never did."

"At this time there is not any indication of foul play, and Detectives from the Criminal Investigations Division are investigating," said cops.

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