here are some Canadian govt. sites that may be of interest;

http://www.justice.gc.ca/en/fs/ht/index.html

http://www.rcmp-grc.gc.ca/imm_pass/q_a_human_e.htm

for the second site, just scroll down until you get to the link

http://www.icclr.law.ubc.ca/Site%20Map/Programs/Human_Trafficking.htm

and then
Human Trafficking - Reference Guide for Canadian Law Enforcement

it was from there that I got the template for my questionnaire

i tried to put these links in an earlier blog but they would not work...it would seem that some of them are working here...if not...google...