Emma Caldwell's killer's past

Retired detective Stuart Hall believes that more of Packer's offending will come to light as investigations into his past continue.

Packer was recently convicted of the 2005 murder of Caldwell, but experts suggest his prolific history of sexual violence indicates he may have had earlier victims.

The case has exposed significant failures in the initial police investigation, which allowed Packer to remain free for nearly two decades.

Families of other missing women in Scotland are now calling for a full review of cold cases linked to the killer.