On 26 October 1997, Australian National University student Anu Singh killed her boyfriend, Joe Cinque, by laci... [展开全部] On 26 October 1997, Australian National University student Anu Singh killed her boyfriend, Joe Cinque, by lacing his coffee with Rohypnol and injecting him with heroin at a dinner party where some of the guests had heard about the plan to murder Cinque. Despite this, none of them warned him.[收起部分]