The heartbroken widower of policewoman Sharon Beshenivsky has condemned human rights laws for preventing the deportation of a prime suspect in the case just six months before the killing took place.

Paul Beshenivsky said it was "disgusting" that 26-year-old Mustaf Jamma, suspected of her murder, was not sent back to his homeland of Somalia after he was freed from jail six months before his wife was gunned down in the street.

Home Office officials ruled it would be unfair to deport him to Somalia amid fears he would be in danger.

Jamma, whose 20-year-old brother, Yusuf Abdillh, was unanimously convicted of the 38-year-old officer's murder earlier this week, is believed to have fled the country after the killing by disguising himself as a veiled Muslim woman.

"It is absolutely disgusting that this man - a criminal who acts like an animal - is shown human rights. What about my kids, my wife, my family?" Mr Beshenivsky told the Daily Mail.

"I'd like these do-gooders that believe in people's human rights to come and explain that to my children. Telling them that their mum wasn't coming back was the most terrible thing I've ever had to do."

Mr Beshenivsky also attacked the failure to deport Yusuf Abdillh in spite of a string of criminal convictions. The brothers are believed to have come to Britain seeking asylum from war-torn Somalia in 1993.

Mr Beshenivsky's remarks came as there were urgent calls for an inquiry into reports that Mustaf used his sister's passport and wore a full niqab to evade checks at Heathrow Airport and flee the country.

Shadow home secretary David Davis insisted there should be an urgent inquiry.

At the time of 26-year-old Jamma's apparent escape between Christmas Day last year and New Year's Day, he was one of the UK's most wanted men and the airport was on high alert in the wake of the July 7 bombing attacks. But it is thought that staff rarely ask those departing Britain to remove veils in order to make sure their identification is valid.