I can't remember the name of this movie but it's based around two teenage girls who live close to each other and communicate through walkie talkies when at their own homes. I think one is called Jane. Their school gets a new principal and one suspects he is a murderer. I remember one scene where they're in his house searching and finds muddy golf shoes and what looks like blood. The principal knows in the end that he's caught and kidnaps one of the girls. I can remember Jane (I think) made him crash into a tree at the golf course, saving her friend who was tied up in his boot.
From this review, a few more details:
A few screenshots from the movie:
Watch the trailer here.