'I've sat alone with 10 mass killers and realised they all share same chilling trait'

Liverpool Echo // Headlines // Local

'I've sat alone with 10 mass killers and realised they all share same chilling trait'

Monday 13th October 2025, 7:14AM

Professor Paul E. Mullen has spent time with some of the world's most notorious mass killers and he has provided some telling insight into the minds of the disturbed individuals

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