“Predatory Behavior” (* out of four) was a grisly pulp melodrama about sex workers that are vanishing all over the city from a ruthless killer and two detectives (Keon Taylor and Dorrean Wilson) try to put an end to his reign of terror before he kills again. Taylor and Wilson actually make a decent team but film is hamstrung by its tawdry production and ugly violence. Strictly for the late-night grindhouse crowd.