She was driving in a park with two male friends when a pair of plainclothes New York City police detectives drove up in an unmarked van. The officers, from the Brooklyn South precinct ... arrested her, put her in the back of the van in handcuffs and ordered her friends not to follow. According to prosecutors, the detectives proceeded to force the 18-year-old woman to perform oral sex on one of them, who then raped her. The 50-count indictment also alleges that the officers, who are facing charges of rape, kidnapping and official misconduct, threatened her with criminal charges if she didn't cooperate. This young woman's experience ... is representative of national patterns of sexual violence by officers during traffic stops and handling of minor offenses, drug arrests and police interactions with teenagers. Research on "police sexual misconduct" ... overwhelmingly concludes that it is a systemic problem. A 2015 investigation ... concluded that an officer is accused of an act of sexual misconduct at least every five days. The vast majority of incidents ... involve motorists, young people in job-shadowing programs, students, victims of violence and informants. In more than 60 percent of the cases reviewed, an officer was convicted of a crime or faced other consequences. [Another] study, funded by the National Institute of Justice ... found that half of arrests for sexual misconduct were for incidents involving minors. Sexual misconduct is the second-most-frequently reported form of police misconduct, after excessive force.