2/3 Police Procedural - 1/3 Giallo. The mixing of genres is surprising and effective here. Not essential but a curiosity worth your time if you're interested in Italian B movies of the 70's. Recommended.
One of the best gialli. Involving crime tale with a prostitute ring that starts its bloody killing spree in the third act. Hybrid with those past popular poliziotteschi. That it comes so late during the golden age is an added bonus. 8/10