1997年4月29日凌晨,德国巴符州卡尔斯鲁厄地区的一名女警察安德里娅·查赫尔(Andrea Zacher)在家中被人用围巾勒住脖颈而窒息昏迷,其父发现后报警。经抢救,安德里娅保住了生命,但因大脑缺氧时间过长而成为植物人。侦查人员发现现场所有门窗都没有强行入室的痕迹,并在现场提取到两个从胶皮手套上脱落的胶皮指头和一个白色塑料袋,里面有围巾、手套、香烟等物品。根据被害人父亲介绍的情况, On the morning of April 29, 1997, Andrea Zacher, a policewoman in the Karlsruhe region of Bad Fuchow, was strangled by a scarf at her home and her father was found Call the police. After the rescue, Andrea saved his life, but because of the brain hypoxia for a long time to become a vegetative state. Investigators found no signs of forced entry to any doors or windows at the scene and extracted two rubber fingers and a white plastic bag that fell off the rubber gloves on site, including scarves, gloves and cigarettes. According to the situation introduced by the victim’s father,