David Victor Canter is a psychologist that helped police on a case involving two serial killers who attacked numerous women and children in the south of what?
John Duffy and David Mulcahy John Duffy and David Mulcahy (both born 1959) are two British rapists and serial killers who together attacked numerous women and children at railway stations in the south of England during the 1980s. They are known as the "Railway Rapists" and the "Railway Killers".
Serial rapist A serial rapist is a rapist who rapes more than one person over a period of time. Some serial rapists target children. The terms "sexual predator", "repeat rape" and "multiple offending" can also be used to describe the activities of those who commit a number of consecutive rapes, but remain unprosecuted when self-reported in research. Others will commit their assaults in prisons. In some instances, a group of serial rapists will work together. These rapists can have a pattern of behavior that is sometimes used to predict their activities and aid in their arrest and conviction. Serial rapists also differ from one time offenders because "serial rapists more often involved kidnapping, verbally and physically threatening the victims, and using or threatening the use of weapons."