Killer Alexander Pacteau was investigated by Scottish police amid fears he may have stalked other women in Glasgow.
The Irish Independent has learned that a woman was interviewed by detectives after they suspected Pacteau may have watched her following indications from neighbours, acquaintances and colleagues of the young man.
The revelation came as police in Scotland admitted that they now believe Pacteau was stalking a random female victim on April 12 - and it was Karen Buckley's ill-fortune that she met the hulking 21-year-old as she walked home alone.