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THIS shared psychotic disorder usually involves one dominant person convincing the other of their beliefs

The Madness of Two: Famous Examples of Folie  à Deux

The UK has one of the highest recorded rates per capita in the world

Acid Attacks: a Crime on the Rise

Why was Jack the Ripper never caught? Or more to the point, why was he never even identified?

How Jack got Away: Did Anti-Semitism thwart the Ripper Investigation?

Children and vulnerable people forced to sell drugs in rural town

The Signs, Crimes and Grime of County Lines

Looking back at the two most shocking gun massacres in British history

Rampage killers : shooters without remorse

Babes in the Woods and the cold cases solved decades later

What the Killer Did Next episode guide

What the Killer did Next: Episodes

Investigating three homegrown British cults

The UK's most notorious cults

Philip Glenister on presenting new true crime series What the Killer Did Next and his favourite crime show

Philip Glenister interview

Was their upbringing responsible? Or were other factors at play…?

Born evil: what drove James Bulger's underage killers?

Barbara Baekeland's relationship with Tony was tainted by a toxic combination of possessiveness, mental illness and alleged incest between mother and son.

Death of a socialite: the Barbara Baekeland case

Daniel Seggie's motivation for killing his Dad, still remains a mystery but what can we learn from other cases of children killing their parents.

Why did Daniel Seggie kill his own Dad?

John Heald went on the run after murdering B&B landlady Bei Carter. Here are 3 more notorious British manhunts.

Britain’s most famous manhunts

Shallow Grave: episode synopsis

Shallow Grave: episodes

When Missing Turns to Murder: episode summary

When Missing Turns to Murder: episodes

Why would a devoted wife kill her husband of 31 years.

She killed her husband but Sally Challen might be the real victim

Five of the UK’s most infamous unsolved missing person cases

Vanished: Britain's five most famous missing persons cases

Should killers be denied parole if they refuse to reveal the location of their victims?

Helen's Law

How does a Family Liason Officer support a family when their loved one goes missing?

Family Liaison Officers – what they really do

The insidious effects of coercive control

What is 'coercive control'?

Does the Netflix series tell us anything we don't already know.

What do we learn from 'The Disappearance of Madeleine McCann?'

If Wesley Neailey's killer was on the sex offender's register, a tragic murder could have been avoided

What is the Sex Offenders’ Register?

You'll be surprised how Britain compares...

How do UK crime rates compare to other countries?

Three highly unusual cases of what can happen when twins turn bad right here in Britain...

Double trouble: 3 twisted tales of criminal twins

Gone overbvoard

Missing at sea: the people who faked their own deaths

Schoolgirl Danielle Jones abruptly vanished one morning in June, 2001.

The Danielle Jones case

What to do if someone you know goes missing

How to find a missing person

Talking to your favourite True Crime podcasts

RedHanded podcast: interview

Should domestic abusers like Ben Blakeley be put on a domestic abuse register?

The Jayden Parkinson Case

The truth behind honour-based violence and abuse

Shafilea Ahmed, a victim of honour abuse

Theories behind her unsolved murder, 20 years on

Who Killed Jill Dando?

Secluded in a new country, Evelyn felt ever more isolated...

Evelyn Lund: murdered abroad

The failings in Janet’s care are depressingly familiar...'

Janet Muller: what went wrong?

Tens of millions of pounds worth of diamonds, gold bars, bearer bonds and bags stuffed with used bank notes, stolen.

Britain’s most lucrative robberies...

What's coming up in What The Killer Did Next

What the Killer Did Next, Series 1B

The rare bond of two psyches stimulating and encouraging each other to rape and murder

John Duffy and David Mulcahy: the railway rapists