Boogaard died at 28 from an accidental drug and alcohol overdose while recovering from a concussion. A posthumous examination of his brain found he had suffered from chronic traumatic encephalopathy more advanced than that seen in some former enforcers who had died in middle age. That disclosure came shortly after the deaths of two other hockey enforcers, Rick Rypien and Wade Belak, both of whom were also under 40 and had similar health issues. The three deaths triggered a debate in the hockey community about the issues faced by enforcers and their place in the game. His parents unsuccessfully sued the NHL and its players' union over his death.