Violet Suicides

As far as mysteries go... this one might by far be the weirdest...
when 16 year old Bill Denbrough goes missing from Derry Elementary school at 12:30 p.m, it has the police stumped, the only clues leading to the 16 year old's location is a trail of crimson blood leading out the front door of the school, and a violet flower.
The police begin to think, the kidnapper sexually assaulted the children before dragging them away from the school, where he beat them unconcious and threw them into the trunk of his car, as the police dogs sniffed only as far to the curb, then turned back into the school.
Since the police have no leads and the killer/kidnapper is still out there, they cancel school until this kidnapper can be found.
And in a desperate attempt to help, the Los(v)ers decide to take this into their own hands, and crack this case themselves.