Sources say police have identified the man they have in custody as the man who was exposing himself to young girls along school routes. 

Police have not released any details on the man, but are continuing to investigate.  

The district released the sketch of a man and surveillance video of a green pickup truck.

Police say the man parked his truck at the corners of school routes and waited for the girls to cross the street.

While the girls wait for traffic to clear before crossing, the man exposed himself.

Watch: Surveillance video of suspected flasher's pickup truck