The Police Investigations and Review Commissioner (Pirc) announced it would be reviewing an allegation made against a senior officer on Wednesday.
Scots Couple Cleared After 5 Month Trial
A husband and wife have been cleared of drug dealing and money laundering following a five-month trial.
Graham Clarke, 36, and his partner Lindsay, 32, were accused of supplying cocaine and using criminal money to establish a soft play business.
The pair from Larkhall, South Lanarkshire, walked free after a jury at the High Court in Glasgow returned a verdict of not proven after three days of deliberations.
Neil Anderson, 40, from Cumbernauld, was also cleared of supplying drugs and Mrs Clarke's mother Marilyn Nixon, 65, from Darvel in East Ayrshire, was cleared of money laundering.
The trial followed a major police investigation named Operation Snapper which has seen the seizure of more than £7 million of class A drugs since 2010.
The jury heard evidence from a convicted drug dealer who was given a reduced sentence and handed a new identity in return for information he gave to police.
Prosecutors had claimed the Clarkes enjoyed a lavish lifestyle without being able to show they earned a legitimate income.
Lindsay Clarke was found guilty of one charge of mortgage fraud and will be sentenced at a later date.
Opposition politicians and organisations representing doctors and nurses have repeatedly highlighted pressures many health workers can face.
London and Edinburgh also ranked in the top 10 list.
The devolved administrations have said they cannot recommend that legislative consent is given to the European Union (Withdrawal) Bill as it stands.
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