Wiktionary
fair cop
n. A justifiable or reasonable capture or apprehension; also, broadly, a just or inescapable accusation.
Usage examples of "fair cop".
He was a fair cop who took only clean graft and his rise in the police department was steady if not spectacular.
I thought it was all going to be chasing men who gave up after the length of a street and said 'It's a fair cop, guv'nor'.
These were the days when villains put their hands up when caught and said things like Its a fair cop, guvnor.
The mechanical punk, who had seen that particular film six times said, Its a fair cop, governor, and raised its hands.