Serial killer Dennis Nilsen believed his pet dog was the only creature that really understood him.The animal, named Bleep, witnessed many of Nilsen’s gruesome murders before he was caught and given a life sentence in 1983.She saw him strangle victims and bury their body parts at his North London home.In a letter sent to author Brian Masters, whose book new ITV series Des is based on, Nilsen wrote: “When I was on my high, Bleep would become sometimes frightened.“She was only a simple dog but even she could see that it was not the real Des Nilsen."She would go off to a quiet corner and hide.“She would greet me the next morning as though I had been away.
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