Michael Madsen, the rough-and-tumble actor best known for his work in the Quentin Tarantino films Reservoir Dogs, Kill Bill: Vol. 2, The Hateful Eight and Once Upon a Time in Hollywood, died Thursday morning. He was 67. Madsen was found unresponsive by deputies responding to a 911 call at his Malibu home and pronounced dead at 8:25 a.m., a Los Angeles County Sheriff’s Department spokesperson told The Hollywood Reporter. Liz Rodriguez, his rep at EMR Media Entertainment, told THR that “we understand Michael had a cardiac arrest.”