The trailer for this looked interesting when I saw it a few months ago. Looks promising.
The story is about 15-year-old John Wayne Cleaver, a diagnosed sociopath who lives above a mortuary owned by his mother. He fears that he is "fated" to become a serial killer, and so lives by a set of rules designed to keep his homicidal impulses in check. His careful regime of self-denial is threatened when he becomes ensnared in a serial murder case in which he senses a connection with the killer.
Based on a novel.
Btw - this the kid from WHERE THE WILD THINGS ARE, all grown up.