Welcome to They Walk Among Us, a podcast dedicated to UK True Crime.

This is the first in a series of monthly bonus episodes.

Listener caution is advised as this episode contains adult themes and descriptions that some listeners may find distressing.

In 2009, Christopher Monks persuaded a boyfriend he met through an internet chat room to kill his parents in return for a disturbing reward.

Christopher Monk's biological parents had neglected him as a baby.

He was fostered and subsequently adopted by Christopher Monk Sr and his wife Elizabeth.

At 10 months old he was the youngest of three children in a close family. His parents were strict but loving.

In 2006, three years before he planned the murder of his mother and father,

Christopher began dating an older man Alex, who he had met through the internet.

When his parents found out about their 21-year-old son's partner,

Christopher tried to run away from home. His parents managed to track him down in London

where he had fled to meet Alex. Christopher's mother later said about the incident. Chris was

immature. We took the computer modem away and his mobile phone as well

to protect him. We wanted him to stop this relationship. About four weeks afterwards, I came home

from work one day and there was notes saying that by losing his computer and his phone, he had lost his

friends. Despite Christopher's age,

his parents considered him more vulnerable than other 21-year-olds. Christopher was diagnosed with

both dyslexia and a form of autism, Asperger's syndrome, though this was only diagnosed by a

psychiatrist after he committed the crime.

The combination of the two contributed to difficulties at school and socialising.

His resentment towards his parents bubbled beneath the surface for the next three years

until November 2008, when Christopher met 19-year-old Sean Scarns

...