Police corruption probes: ‘The very letter of the law’ denies answers after Line Of Duty finale

© BBC / PAYou could watch Line Of Duty - starring Vicky McClure as Detective Inspector Kate Fleming, Adrian Dunbar as Superintendent Ted Hastings, Martin Compston as Detective Inspector Steve Arnott - four times over in the time Police Scotland estimates it would take to count the number of corruption investigations carried out over the last five years