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***WARNING: CONTAINS SPOILERS FOR DON'T F*** WITH CATS***
The frankly unbelievable story of the crimes of Luka Magnotta and the international manhunt that followed has been blowing people's minds ever since three-part documentary Don't F*** With Cats was released on Netflix last month.
The 37-year-old is currently serving a life sentence, having been convicted of killing and dismembering Jun Lin, before posting his hands and feet to elementary schools and political party offices in Canada.
The search for Magnotta started prior to this though, after he shared a series of videos online of him killing kittens and cats. In one of these videos, a third hand can be seen - and Magnotta's mum Anna Yourkin believes this hand belongs to Emanuel 'Manny' Lopez.
Magnotta said Manny was the mastermind behind the killings and he told his mum and lawyers about his existence on numerous occasions during the years prior to the murder of Jun Lin.
However, investigators found no evidence of his existence, with the online sleuths who helped to track down Magnotta suggesting that Manny was a fictional character Magnotta created, inspired by the film Basic Instinct.
Magnotta has a clear interest in the film - the murder of Jun Lin mirrored a killing from the movie, while one of Magnotta's online aliases appeared to be derived from the name of Sharon Stone's character.
Ms Yourkin is convinced, however, that the third hand in one of the cat killing videos belongs to Manny.
Speaking to TMZ, she said: "In the cat killing video, there's a third hand you can see. So, there's my son's two hands and there's a third hand. So, you can't see a face, so it's unidentifiable - but, Manny was there. My son had phoned me and told me. So, I'm assuming that that hand is Manny Lopez's hand.
"The police should start investigating. They have it right there, they can take a look, they can do something.
"I had a document folder in my inbox, this is before the crime happened, and he had sent me a picture of Manny and the police seized my computer so they have the picture of Manny.
"I brought it up several times to my local police department that I needed my accounts back, but they were all closed off and Interpol was not willing to release what they found."
Ms Yourkin added that her son had in the past encouraged her to do things online which she felt 'were not right to do'.
She said: "He wanted me to do certain things on the internet that I felt were not right to do, so I didn't, I told him I'm not going to do them... create accounts, add to those accounts different people, and do a Facebook, and use some photos of me, get things out there, and I felt very uncomfortable and I said no. And he said then, our relationship is over."
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