John Entwistle died June 27, 2002 in Room 658 at the Hard Rock Hotel Las Vegas from a heart attack brought on by taking cocaine on the day before The Who kicked off their American tour.
According to The Clark County medical examiner, after spending the day with band, Entwistle went to bed at 3:00 AM that night with stripper/groupie Alycen Rowse…
Rowse woke at 10:00 AM to find Entwistle "unresponsive and cold to touch." A forensic toxicologist, said: "Cocaine would not have caused death on its own. This was not cocaine poisoning. This sort of level would not have caused his death had it not been for the effects it had on his damaged heart." He estimated the 57 year-old Entwistle had used the drug three to four hours before his death.
John Entwistle October 9, 1944 – June 27, 2002