"Who, what, where, why and when?" are the essential questions at the heart of every homicide investigation – for detectives but also for journalists chasing the 360-degree story. Investigation Discovery’s all-new news magazine KILLER INSTINCT WITH CHRIS HANSEN, he brings his journalistic skills and criminal insight to an enthralling new series, digging deep into the depths of a killer’s mind and bringing life to some of America’s most chilling and heart-wrenching homicide cases.