the macabre theory has been investigating the killing of david king , a 70-year-old pensioner from newham , east london .
his body was found by sniffer dogs last week in the picturesque hamlet of pierres , south-west of caen , and an unnamed 28-year-old frenchman has been charged with his murder .
mr king 's car , a renault scenic -lrb- above -rrb- was found parked in vire , a nearby town , but there was no sign of any body .