Osborn wrote: 'He seemed fine, doing the things he loved-working out, caring for clients as part of Lifelong AIDS Alliance, and spending time with his family-until a week ago when he had trouble breathing and was admitted to the hospital with what we figured was a routine infection. According to an October 16 Facebook post written by Chuck Osborn, Tank died 'due to a previously undiagnosed lung ailment.' On October 15, 2018, a 28-year-old Australian-born Seattle resident named Jack Chapman, also known as Pup Tank, died.
