In the fourth episode of ITV's A Confession, barristers debated whether Christopher Halliwell’s admission to the killing of Becky Godden-Edwards and Sian O’Callaghan could stand up in court.

Halliwell’s barrister – played by Inspector Lynley actor Nathaniel Parker – trapped detective Steve Fulcher (Martin Freeman), who appeared to describe police evidence rules as a loophole.

As the episode ended, viewers saw that manoeuvre to capsize Mr Fulcher’s career in the force – despite Halliwell receiving a 25-year prison sentence for Sian's murder.

Here’s what you told us on Facebook….

Rosemary Kent: “He deserved a medal for what he did, not punishment.”

Anna Fionda: “25 years doesn’t bring back their daughters, the man is a monster and evil.”

Elspeth Hughes: “Wiltshire Police should have applauded Steve for what he achieved.

“Becky would never have been found otherwise. My thoughts are with the families of Sian and Becky, may they rest in peace.”

Lauren Curtis: “It was a hard episode to watch. Can’t get over how poor Steve was treated. Without how he handled the situation, Karen would never have gotten her daughter home.”

Kelz Clarkson: “Assuming those people on the side of Halliwell have young girls in their families, whether they have their own or through relatives, why on earth would they want a serial killer on the loose? Why the hell did they play on such a small technicality to try and diminish the crime he committed? They should have encouraged Halliwell to repeat in court what he said out at Barbury Castle. The whole thing is shameful.

“Thank goodness for people like Steve Fulcher or goodness knows where we would have ended up with this case.”

Maria Phillips: “They seem to have dismissed the fact that there was other clothing etc found, and the suggestions about other murders seems to have been dismissed by the senior police even though Steve seemed to be pretty sure other murders may have been committed.”

Laura Morgan: “25 years? He doesn’t deserve to live. The episode left me feeling very angry. Well done Steve Fulcher. Becky’s body still to this day wouldn’t be found if it wasn’t for him. RIP Becky and Sian.”

Helen Striker: “He got a whole life sentence when they were able to try him for Becky's murder as well. I applaud Steve Fulcher’s actions. Both families were able to lay their precious daughters to rest. How can that be wrong?”

Rachael Chance: “If it wasn’t for Steve Fulcher, they would have never found Becky and I doubt they would have found Sian; it was a split-second decision he had to make.

" I truly believe he has killed more people. I do hope that they are still investing this, as not so sure. My heart goes out to the families and friends of the girls.”

Rachel Cole: “Steve Fulcher is a hero. Sian and Becky’s bodies would never have been found if he didn’t act and do what he had done.

"It’s appalling how he was treated. Well done Steve for everything you did.”

Martyn Ellis-Parker: “It is time no comment interviews received heavier sentences to encourage people to speak, in the same way where a life could be at risk a police officer should be allowed to be a real detective for a period of time. Steve Fulcher is a loss to the force.”

Philip Nash: “My sympathy goes to you to Steve for this barbaric treatment you were given. I thank you personally for all the hard work you put into the case, it’s a shame your colleagues didn’t think the same.”