The Sangres Motorcycle Club are outlaws, notorious for drug-running, illegal weapons sales, and possibly even murder. But what they don’t know is that the Bureau of Alcohol, Tobacco, Firearms, and Explosives has a man on the inside....

Can Darrin “Koz” Kozlowski survive long enough to bring them down from within?

KOZ tells the tale of how ATF agent Darrin “Koz” Kozlowski pulled off one of the largest organized crime busts in a generation. This gritty, LA-after-dark story dives deep into the world of one of the most dangerous motorcycle clubs in Los Angeles, bringing these unbelievable true events to life.

“Koz” works his way up the club ranks. But the more entrenched he becomes, the more the stakes grow and spiral. Either he proves he’s as ruthless as his Sangres brothers, or he risks his and his family’s lives. As the story speeds toward its conclusion, the question becomes: Will Koz unearth the Sangres’ dark secret? Or will he blow his cover and be run down before getting the chance?

Taylor Kitsch (Waco) and Kate Mara (House of Cards) star in this fast-paced, immersive Audible Original based on a true story. Its format features scripted storytelling from an all-star cast, and includes interview excerpts from the real Darrin “Koz” Kozlowski, allowing listeners to dive deeper into his psyche for the first time

Please note: This content is for mature audiences only. It contains adult language and themes. Discretion is advised.

'90s. California. Hollywood Boulevard. Koz is a long way from his roots in Milwaukee and sets out to get involved with the Sangres, one of the most dangerous outlaw motorcycle gangs in Los Angeles. But when his friend Ripley winds up dead, Koz finds himself with a gun to his head, forced to defend himself against the Sangres who may know his secret: that he’s an undercover ATF agent.