In your area, a committee report was issued in 1999 detailing work that at that time was currently being done. Of note though is the Committee members and the organizations they were then a part of:

Adults Saving Kids
Breaking Free
PRIDE
Project Offstreets
Catholic Charities
Also of note:
The Minnesota Coalition Against Sexual Assault
and
Adults Saving Kids

Contacting one of these organizations might be a good first step to get involved with local work already being done, a quick Google search should get you current information. Let us know if you have a hard time finding contact info for any of these.
Thanks.

www.heart-intl.net/HEART/080105/JuvenileProstitutionMinn.pdf