According to BBC News: 23 October, 2019 Dennis Nilsen died a painful death at the age of 72 & spent his final hours lying in his own filth as he suffered a ruptured abdominal aortic aneurysm. His medical cause of death was given as a pulmonary embolism and retroperitoneal haemorrhage, linked to the ruptured aneurysm. A report from the Prisons and Probation Ombudsman stated that Nilsen had been left "deteriorating for two and a half hours" after rejecting the opportunity to be seen for longer in the healthcare wing on the morning of 10 May last year. But it also stated that the treatment he initially received in prison was "commensurate with that which he would have received in the community".