A true story, about the real murders of two women many years apart, by Christopher Halliwell.
Dramatisation based on "extensive research, interviews and published accounts".
Martin Freeman as the Snr Det Supt Steve Fulcher does technically miss applying the professed PACE rules during an arrest as the suspect suddenly opens up slightly by admitting a further murder (of the daughter of Imelda Staunton and Peter Wight as the parents of Becky). You can feel for Fulcher who is a dedicated officer when he's disgracefully pilloried by his own and you feel the pain of all the others when so many doors to justice are slammed in their faces. Such is the corkscrew logic of strict legal rules without consequent use of common sense when it is applied.
A worthy watch. Enjoyed this.