BERLIN (AP) — They called themselves the “German driving school for experts,” but prosecutors say the true purpose of their Telegram chats was to brag about the women they raped and share tips about how to drug them.In posts that sometimes included photos and videos of their attacks on unconscious victims, they referred to women as “cars,” sedatives as “fuel” and rape as “driving,” according to court documents. They called their victims “dead pigs.”Investigators have been poring through several years’ worth of posts in roughly two dozen group chats on the popular messaging app that authorities believe served an online predator network of mainly Chinese men targeting mostly Chinese women in Germany. Their investigation has led to the convictions of three alleged inner circle members on rape and other charges, and the ongoing trial of a fourth man in Berlin.

___EDITOR’S NOTE: This story includes discussion of sexual violence. If you or someone you know needs help, please call 1-800-656-4673 in the U.S., 116 016 in Germany or 15117905157 in China.___“The perpetrators were characterized by a particular ruthlessness, an objectification of the victims, and the perfidious planning of their crimes,” Frankfurt chief prosecutor Dominik Mies told The Associated Press.