Police officers who 'brought shame on their uniforms' and let Emma Caldwell's killer Iain Packer walk free for 19 years should be jailed if it is found they 'engaged in criminality', her family's lawyer says.

Packer, 51, was sentenced to life with a minimum term of 36 years at the High Court in Glasgow this month after being found guilty of murdering the 27-year-old in 2005, as well as 11 rapes and 21 other charges, including sexual assaults, against other women.

Yet 'one of the UK's worst sex offenders' was left to roam the streets for nearly two decades despite officers being repeatedly told Packer 'is the man' and the warped killed taking officers in 2007 to the spot where Emma's body was dumped.