The sadistic killer has butchered as many as 50 animals, mostly cats, in the Croydon area of South London over the past three years with more and more cases taking place in the recent months. 

Cats are being found decapitated or disemboweled not far from their owners’ houses.

"There are some parallels with serial killers who target humans who take trophies such as watches, underwear, jewelry, or even hair,” criminologist, Dr. Adam Lynes from Birmingham City University, told Sky News. 

“And it could be the case that this person is keeping the heads and tails [of the cats] as trophies, to re-live the moment. Given that they dump the cats' bodies at - or near - the homes of the owners would suggest they like the attention,” Lynes added. 

RT