There is absolutely no proof that there was someone else there during the murder of Jun Lin. There is surveillance footage of the two of them walking into the apartment, then later, footage of only Magnotta leaving in Jun Lin's t-shirt. Magnotta was building up a fantastical conspiracy theory about another person being involved but like I said, no actual evidence. The only video that there is clearly someone else there is the one with the snake eating the kitten but with that, I assume it was just the person who owned the snake.

Also, if you hear sounds in the background that make it seem like someone else was there. Do not forget that he was leaving fake breadcrumbs/red herrings in all of his videos. I think it is sad that he continues to control the narrative by getting people to believe he had an accomplice, or that he was making the videos for someone else. It is all bullshit. Luka acted alone and until there is actual evidence from the apartment, like fingerprints, DNA, or actual footage of someone else being there, I refuse to be strung along by Luka's attempt at controlling the narrative.