The official trailer for Peacock's new documentary Gary suggests that the former Diff'rent Strokes child star died suspiciously after a tumultuous marriage, financial problems and persistent depression.

Premiering August 29, the 90-minute documentary about Gary Coleman follows the actor’s rise to international fame and his struggles with life in the spotlight, along with the controversy surrounding his tragic death at age 42. For the first time, Peacock promises, viewers will get an inside look at Coleman’s private world through exclusive interviews with fellow actor Todd Bridges, former managers, his estranged parents and Coleman’s ex-wife.

Coleman, who grew up with his adoptive parents, suffered from kidney disease; the medications he took to treat the condition had a negative impact on his size. Still, he became the highest-paid child actor on TV in the late 1970s and 1980s for his work on Diff'rent Strokes and other shows. He died in 2010 in Utah.

The documentary was directed by Robin Dashwood, executive produced by Louise Norman, Tom Sheahan, Steve Boettcher and Mike Trinklein, and produced by RAW.