The Shipman Files: A Well British Crime, a new BBC documentary alleges that the murderer, doctor Harold Shipman, had a heartless reaction when he was shown pictures of the victims of his allegations.

A number of his patients were investigated for murder at the Pontifact General Infirmary between 1975-1996.

He pleaded guilty to murdering 15 people, but it is estimated that most of the elderly women he killed killed more than 250.

The faithful GP shipman gave deadly doses to many of his patients – and walked away with cash from their will.

Shipman was arrested in 2000 and sent to prison, with police gathering more evidence that he believed they had been killed.

Ever since Shipman showed them photographs of patients from the time he knew them, his naughty reaction showed a heartless man.

He turned his chair and leaned against the wall, even closing his eyes when detectives put the photo in front of him.

Former Detective Chief Superintendent and former head of the Westside Yorkshire Police Homeside and Major Inquiry Team, Chris Greg, questioned Shipman and spoke about the experience in the documentary.

“During the interrogation, we wanted to show him a picture of Lily Crossley, Robert Lingard, Eva Lions in 1975 and present him with as much information as possible to make these allegations.”

Greg added that the shipman was joking with the guards until he realized he was at the Halifax police station and then “his whole behavior changed.”

“As soon as I introduced him he bit me from his ankle and threw me behind his back,” he said.

“I was reading his rights and asking him the details, and the custody officer was asking the same thing, and he refused to talk.

“My colleague John Barr said that when I was talking to him he was looking at John’s tie which had stains on it and he could tell that he was counting the stains accurately.

“He was restraining himself from what was happening.”

He added: “During the interview, he was adamant that he would not cooperate in any way, size or form, and at one point he turned the chair and sat in the corner.”

A clip from Shipman’s interview was then played, where he was sitting with his arms folded.

And when a picture of Lily Crossley was presented to him, he closed his eyes and even refused to look at her.

“We went to interrogate him for a few days and he didn’t say a word as he left the Halifax police station,” Greg said.

In 2004, Shipman was found dead in his prison cell after taking his own life, leaving many members of his victim’s family and potential victims feeling that he had betrayed justice.

* Shipman files: A very British crime is available on BBC iPlayer