Strathclyde Police have been ordered to apologise to a man they detained unlawfully.
The force was told by the Police Complaints Commissioner for Scotland to say sorry to a man arrested after his dog bit his partner's nephew.
He was detained under legislation which can only be used for offences punishable by imprisonment, which was not the case for this alleged offence.
The man later complained about comments made by officers. The force investigated and discovered the error but the man was not informed.
Commissioner John McNeill said the force's decision not to tell the man about his unlawful detention was "wholly inappropriate".
The information was uncovered by the PCCS in police files during the review of the original complaint which Prof McNeill said police had dealt with reasonably.
In all, 27 complaint-handling reviews and three decision letters, involving 75 individual complaints, were published. Prof McNeill also warned police over the late arrival of files he'd requested.
A spokeswoman for Strathclyde Police said it would implement his recommendations.