But no matter how many people they have killed, no matter how many lives they have ruined and whatever the nature of their sickening crimes, serial killers are still human. Analysing the early years of the lives of men like Jeffrey Dahmer, who abused and killed 17 young men, offers a fascinating insight into the effects of a dysfunctional or abusive childhood. Criminologists Christopher Berry-Dee and Steven Morris have spoken and corresponded with...