The Police Investigations and Review Commissioner (Pirc) announced it would be reviewing an allegation made against a senior officer on Wednesday.
Man Arrested Over Attack On Pair
A man has been arrested following the alleged attempted murder of two brothers.
The men, named locally as Peter and James Stewart, required hospital treatment after the incident in a stairwell in Edinburgh's Wardieburn Place West on April 8.
It happened after the pair had travelled more than 100 miles from Aberdeen to buy a car.
Police said a 30-year-old man has been arrested and charged in connection with the incident.
He is expected to appear at Edinburgh Sheriff Court on Monday.
Earlier this month, a 16-year-old man was arrested in connection with the incident.
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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