This 196-page report concludes that in many sexual assault cases, the police did not file incident reports, which are required to proceed with an investigation, or misclassified serious sexual assaults as lesser or other crimes. Human Rights Watch also found that the police presented cases to prosecutors for warrants that were so inadequately investigated that prosecutors had little choice but to refuse them and that procedural formalities were used to close cases with only minimal investigation. The mayor and City Council should create an independent mechanism to monitor police department response to sexual assault complaints, Human Rights Watch said.