Confessions of a Serial Killer with Piers Morgan: What makes a killer?

In a new ITV true crime series, Piers Morgan delves into the mind of Bernard Giles, one of the most notorious serial killers in the US, sitting down with the convicted killer in a chilling interview.

Giles - who was only 19 at the time - went on a three-month killing rampage in the early 1970s.

He is currently serving a 45-year sentence for the murders of:

• Paula Hamric, 22

• Nancy Gerry, 18

• Carolyn Bennett, 17

• Sharon Wimer, 14

• Krista Melton, 14

However, it’s speculated he could have murdered more women which hadn’t confessed to.

Dr Casey Jordan is an investigative profiler, and criminologist. She said it’s difficult to determine what shapes a serial killer, but “the bottom line is it’s back to the nature vs nurture debate.”

Giles had a relatively normal childhood and his siblings, and for profilers, it’s difficult to determine what moment - if any - triggered these homicidal tendencies.

“If he wasn’t 19, or full of raging hormones and testosterone at the time, would things have been different?” asked Dr Jordan.

She added Giles was a “hedonistic lust serial killer”, who killed arbitrarily without fear of being caught.

Watch Confessions of a Serial Killer with Piers Morgan Thursday 9pm on ITV.