Justice Secretary Neil Gray also commented on the severity of the case and the courage shown by those who came forward.
"This is a horrific and deeply shocking case and my thoughts, first and foremost, are with the victims, who have shown enormous courage in coming forward," said Justice Secretary Neil Gray.
Gray condemned the breach of trust committed by the late officer.
"The public place their trust in the police and for any officer to abuse that trust and the office they hold is truly heinous," said Gray.
He reassured the public regarding the standard of the broader force.
"The vast majority of officers serve to protect people and keep them safe, and the public should be confident about reporting any crime involving sexual violence to the police," said Gray.
Gray noted that the response to the initial report demonstrated police willingness to investigate internal misconduct.
"As has been shown since the first victim came forward, the police will investigate such reports," said Gray.
An anonymous source close to the investigation described the case's impact on the institution to the BBC.
"It feels a bit like this could be Police Scotland's Wayne Couzens moment," said an anonymous source close to the investigation.
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Police Scotland has established a dedicated helpline and email service under Operation Submarine to encourage further potential victims to contact the inquiry team.
