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A film about a mutant or vampire or what boy who has escaped from a clinic where they did human expriments on him, and a guy chases him

So I haven't seen it from the beginning, but I remember it was about a boy who has escaped from a clinic where they did human experiments on him. His mother died as they were escaping. There was a man who hurted them and he took revenge on him since he was some kind of vampire or supernatural person. There was a couple who adopted him and he had some strange habits like he always wanted to eat his meat bloody. He fell in love with a girl and he had a best friend. But that guy who chased him killed his friend, or just made him angry at him so the main character killed him I don't remember. The boy accepted to go with that guy who chased him, just to let his new family and the girl live in peace, but his new dad helped him when he got to know about the experiments, and they killed that man who chased him, and burned the papers about the clinic and the patients.
asked Aug 16, 2017 in Name That Movie by Tsukihimi (2 points)
retagged Aug 28, 2017 by Tsukihimi
I can't believe it. I mean I have been looking for this movie about 2-3 weeks ago and nothing. However I'm sure about what I said. It was a teen boy. And about the experiments, they tell about the experiments only at the end of the movie. That guy who chases him, he has the photos about the experiments.
And at the end of the movie, the boy gets a new haircut. I dunno why but I remember for sure.
I am still looking for this freaking movie, it drives me crazy sometimes when it comes to my mind and I start to search for it for hours but I can't find it. Please, someone tell me that I'm not crazy and it really exists. XD
There was nothing else that ever came to mind? I searched again with what facts you have and nothing even close came up.
The only thing that came to my mind is that the boy didn't grow older, because on the photos from the experiments, he was still that young and they were old photos.
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