Michael Madsen's manager previously said, 'What we understand is Michael had a cardiac arrest and was found unresponsive in his Malibu home' on July 3. The 'Kill Bill' actor was 67.

Madsen died from cardiac arrest, his manager Ron Smith told NBC News. Cardiac arrest occurs when the heart stops functioning. It can lead to death without immediate treatment, according to Mayo Clinic.

Michael Madsen was trying to turn his life around right up until the very end. The “Reservoir Dogs” actor, who passed away Thursday, July 3, at 67, was said to be sober before his death despite a yearslong battle with alcoholism, per TMZ.