A fourth member of an armed gang convicted of killing Bradford policewoman Sharon Beshenivsky has been jailed for 20 years.
Hassan Razzaq, 26, was involved in planning the robbery, which ended in the death of PC Beshenivsky, in a "measured and determined" way, Leeds Crown Court heard.
Two men are already serving 35 years each in jail for the policewoman's murder and Razzaq's brother, Faisal Razzaq, was sentenced to life, with a minimum of 11 years behind bars, for manslaughter last December.
Sentencing Hassan, of Forest Gate, London, yesterday, judge Mr Justice Andrew Smith told him he knew loaded firearms were to be used in the robbery at the Universal Express travel agents, in Morley Street, Bradford, in November 2005.
The judge said: "You were involved with planning the robbery several days before. This was not impulsive, but measured and determined offending.
"I am sure you knew that loaded guns, a highly dangerous machine gun and a pistol, were not only to be carried by the raiders but used to threaten those who got in their way.
"You personally and willingly were at hand to assist in the execution of the dangerous raid."
The judge sentenced Razzaq to 20 years for the manslaughter of PC Beshenivsky, 38, of Hainworth, near Keighley, and robbery and six years concurrent for two charges of possessing prohibited weapons. He was convicted after an 11-week trial last year and the case adjourned for pre-sentence reports.
Mr Justice Andrew Smith said that even apart from the death of PC Beshenivsky and injuries to her colleague PC Teresa Milburn, who was also shot, he would have sentenced him to 16 years for the armed robbery "given the planning, the weapons and the gratuitous brutal treatment of those inside the premises".
He told Razzaq he would serve half his sentence in prison and would then be released on licence but would be liable to be recalled if he breached the terms of the licence.
After the case Detective Superintendent Andy Brennan, who led the police investigation, said he was pleased with the sentence and said Razzaq had played a pivotal role in the planning and organisation of the robbery.
He said: "In some respects he would be regarded as the brains of the robbery. His role cannot be underestimated."
Det Supt Brennan added that though justice had been done in the sentences handed out in the case, justice would never be done for PC Beshenivsky's family.
He said: "She will never be there for her children, her step-children and her husband."
Det Supt Brennan pledged that two members of the gang still on the run, Piran Ditta Khan and Mustaf Jamma, who are thought to have fled abroad, would also be brought to justice.
"It may take time but I am very confident we'll find them and they will stand trial at some stage," he said.
Razzaq had acted as a lookout round the corner from the Universal Express premises in Morley Street, Bradford, while the robbery took place and five days earlier had carried out a reconnaissance of the area in his car as part of the planning.
Jonathan Devlin, prosecuting, told the court that Razzaq had been sentenced to 12 months in a young offenders' institution for a street robbery in 1999 when he was aged 17.
The judge, who said the 389 days Razzaq had spent in custody would be brought into account against his sentencing, said he had not foreseen anyone would use the guns to do serious injury in the robbery, but he assisted in planning and carrying out the carefully planned armed raid.
Last December Muzzaker Imtiaz Shah, 25, and Yusuf Abdillh Jamma, 20, were both sentenced to a minimum of 35 years for the murder of PC Beshenivsky.
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