What Creates A Serial Killer?

From Jack the Ripper to present day cases, what makes a serial killer? Can forensic profiles, new research, and big data really help authorities understand how and why they strike. To discuss, The Agenda welcomes Jim Clemente, writer and co-producer of the television series, "Criminal Minds," Tim Clemente, a retired FBI special agent and counter-terrorism specialist, and Michael Arntfield, a Western University criminology professor.