No Way Back (1976)
No Way Back is a 1976 Blaxploitation film starring Fred Williamson who also starred in the film as Jesse Crowder, a private detective who once used to belong to a police force but that now finds himself taking odd jobs for a little extra money. Catchphrases include “ Never trust a woman with her clothes off!” and “You pay the bill. I’ll deliver it, legal, illegal, moral or otherwise!”
More at Wikipedia.