First of all, lets assume that this is a thriller-crime movie and thus is to be interpreted in the context of Silence of the Lamb and other serial killer movies. Thats all right, I like the genre.

What this genre needs is I think: 1) a psychological thread; a detective with psych issues, love, faith e.g. and these issues tend towards some sort of solution or elaboration 2) an intellectual thread; a complex, mind-stimulating, yet not too far- fetching murder case. 3) good realization; atmosphere that presents us the above two as (at least spiritually) real.

This film accomplishes these tasks: 1) An obsessive+compulsive detective with affection problems, buried past etc. And there is "character development", I like the atypical disintegrating end which is barely relieved by the end title music. 2)An artist-killer is not a never-heard-of idea, but anamorphosis is good idea. I liked the way the murder cases interconnect. I liked the way this all leads to the past. I liked, that some characters say 'forget about the past' some say 'go back! its the same'. 3)atmosphere is good, music good, murder scenes especially good.

Why did I gave it a 6? It is not original. Especially as for atmosphere creating, directing and filming. It is absolutely filled with clichés. There are original things are the character of the detective and the final...but maybe thats all... I still would say it is worth watching it, but it is just an other serial killer movie.