Piers Morgan's 'most chilling' interview with serial killer who confessed to moment he became a 'monster'

Piers Morgan described the 'most chilling' moment of an interview he did for Confessions of a Serial Killer where a murderer revealed the moment he became a 'monster'.

For the interview Morgan was speaking to serial killer Bernard Giles, who murdered five women in the span of three months in 1973 in Titusville, Florida.

The killer was arrested in December 1973 after a pair of hitchhikers he lured into his car were able to escape after his gun malfunctioned and he was unable to murder them with it.

They were able to identify him to the police and he was arrested the next day, eventually striking a plea bargain where he confessed to his murders so he could avoid the death penalty.

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During the interview with Morgan the serial killer who preyed on young girls who were hitchhiking described his first murder, where he killed 18-year-old Nancy Gerry and described how he felt.

He said: "I told her to get out of the car and that's when she became afraid. I walked her over in front of a tree and I shot her.

"Very stimulated, very provoked, I mean the thing is, what is your passion in your life? What is the thing you like to do more than anything else?

"And you're doing it. You are so there, that you can almost see the atoms vibrating. It's just, it's difficult to describe."

After the interview Morgan said he had been left feeling 'emotionally drained' at how matter-of-fact Giles had been while describing his murders.

He said that was the interview where afterwards he went back to his hotel room and poured himself a drink as it had affected him so much.

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Morgan would later tell This Morning about the 'most chilling' part of his interview with Giles where the serial killer described having a huge urge to kill a woman as he passed her on the street before his first murder.

He said: "Probably the most chilling part of the whole thing was a moment when he was 16, two years before all the killings, he passed a woman in the street and he had a knife on him and she opened her car door and got out.

"And he said he felt this uncontrollable urge to kill her and he kept walking. And I said 'Well, what would have happened if you hadn't kept walking?' And he just matter-of-fact said, 'She would have been murdered'."

"That woman, whoever she is, will have no idea how close she came to being killed by this monster."