To answer your questions (per seniorjudge's request):
How much research have I done?
Not a lot, but I did come across this article in the course of Googling the issue, and thought it was interesting.
http://policechiefmagazine.org/magazine/index.cfm?fuseaction=display_arch&article_id=299&issue_id=52004
Does my FIL know these officers?
Yes, everyone knows everyone in that town, and my FIL does know these two officers, and they apparently haven't gotten along well in the past (no, my FIL has never been convicted of or charged with a crime - he's just kind of a cantankerous guy). Also, they didn't enter and search for a phone number; they entered and demanded that my FIL tell them his brother's phone number.
Do I really not know who to complain to?
Of course my FIL has complained to the Chief of Police. He just doesn't think it will do any good.