Emma Caldwell's mother to meet First Minister Humza Yousaf

It took 19 years to try and convict Iain Packer for Emma Caldwell's murder

The mother of Emma Caldwell is to meet the first minister on Tuesday to call for a public inquiry into the investigation of her daughter's murder.

Margaret Caldwell wants a judge to look into the failings by police in the case.

Iain Packer was jailed for life on 28 February for the murder of Emma as well as 11 rapes and multiple sexual assaults against a total of 22 women.

The Scottish government has said it will consider a public inquiry.

After the verdict, Police Scotland apologised for how the original inquiry was handled and for letting down Emma and other victims.

Ms Caldwell's family said she had been failed by officers due to a "toxic culture of misogyny and corruption" which left Packer free to rape other women.

A BBC investigation showed how police missed the chance to catch Packer in the months after her murder because senior officers repeatedly dismissed him as a suspect.

Four former detectives who were involved in the earliest stages of the inquiry said evidence of Packer's violent, abusive and predatory behaviour was known to police from the start of their investigation.

But they said senior officers told them not to pursue Packer and instead wrongly built a case against four Turkish men who were then cleared.

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Mrs Caldwell told BBC Scotland News she could "breathe again" after Packer was found guilty.

"When they found Emma's body, and they came in and told me they had found her body, I just took this huge breath in and now I feel as if I can let it out," she said.

Margaret Caldwell has called for a judge-led public inquiry into the investigation

"I can breathe again and go on. She will always be in our thoughts. She will always be there. She will always be my Emma."

The family's lawyer Aamer Anwar described Packer as being "one of the UK's worst sex offenders" and called for a "robust" judge-led public inquiry into the original police investigation, adding that some officers had "blood on their hands".

'Tireless campaigner'

Speaking at first minister's questions on Thursday, First Minister Humza Yousaf said ministers were exploring a judge-led public inquiry and said they were giving "very serious consideration" to the idea.

On Monday, Mr Yousaf, said he was looking forward to meeting Mrs Caldwell, though he wished it was not under such circumstances.

"I want to pay tribute to Margaret Caldwell who has been a tireless campaigner," he said.

"I'm looking forward to hearing directly from Margaret Caldwell and then of course rightly we will update parliament in terms of any next steps that we choose to take forward."

Later in the week, Mrs Caldwell is also due to meet the chief constable of Police Scotland and the Lord Advocate, Dorothy Bain KC.

You can watch Catching a Killer: The Murder of Emma Caldwell on iPlayer now.

You can listen to the podcast series Who Killed Emma? on BBC Sounds.