Similar films to my film idea

Similar films to my second (main) idea about the vanishing of the two girls would be firstly The Lovely Bones even though it's more of a supernatural drama I feel that the fact that there's an elderly male who looks like an average innocent person who is capable of kidnapping Susie would be similar to my idea as I'd like the character of the man to be quite like the character who plays in my film idea...

His whole nature is deceivingly friendly which is how my character would be portrayed. This would gain the audiences attention as only they would see that something is wrong like we naturally do in The Lovely Bones where as my two girl characters would have no clue and would just assume an old man needs help.

The setting would be comparable to my idea as it's very secluded in Lovely Bones, the man lures the girl to an underground attic which he's obviously been working hard on to seduce girls to go there which could be similar to my character as he puts a lot of effort into making posters of girls claiming they've gone missing

As in The lovely Bones we are aware of the male character (George Harvey) from the very start however we don't see him as a threat to the soon to be victim which would be like my film, their existence is known but we don't know what they're capable of which would also be similar to the film Psycho

The film that's similar to my first idea of a mentalist escaping from an asylum and killing the whole film being from his point of view and him never been seen is Dexter the tv show as it's a show from a killers point of view even though there are slight differences as you know who Dexter is and his reason for killing whereas my film idea would be a bit more mysterious and thrilling as you never find out who the killer is. 

This film idea would also be slightly similar to Peep show as the camera technique would be the same, Peep show inspired this idea of a killers point of view as it would be thrilling for the audience to never know who the killer actually is.

Lastly I think a film called The Resident is related as in this film the killer is watching and so you get a good perspective from him during the film as in my idea the killer is watching his victims.