A devoted and mild-mannered couple decides to kill one of their parents.

Notts’ lead detective has spoken about his mixed feelings ahead of the start of a major four-part television drama about one of the county’s most infamous murders ahead of the start of a major four-part television drama tonight.

Landscapers stars Oscar-winning actress Olivia Colman, explores the murder of William and Patricia Wycherley, whose bodies were found buried in the garden of their Mansfield home 15 years after they were shot and killed.

The TV show also explores the disturbing tale of murderers Susan and Christopher Edwards, who stole and spent vast sums of their victims’ money.

This experience will be a rare one for Assistant Chief Constable Rob Griffin, who led the inquiry at the time as a Det Chief Insp.

Mr Griffin, who joined Nottinghamshire Police in 1995, is played in the drama by actor and comedian Daniel Rigby.

Assistant Chief Constable Rob Griffin

He said: “This has been on the cards for a very long time now, so I’ve had a long time to get used to the idea.

“But it really is a strange experience to see the case my colleagues and I worked so hard on turned into a TV show – especially one featuring someone as famous as Olivia Colman. She really is a fantastic actor so when I heard she was involved I knew it was going to be a fairly high profile show.”

The show broadcasts in the UK, from 9pm today on Sky Atlantic and NOW TV.