Noel Chapman, 36, pleaded guilty to four charges of demanding a total of £140 during July and August. Another man appeared with Chapman, but, because he pleaded not guilty, his case was put back for trial.
Judge Nance told Chapman “You repeatedly blackmailed an old man and induced him to part with money by pretending as a police officer that you would report his involvement in homosexual activities, of which there is no evidence whatsoever.
“You further set about staging a charade with another man, to get more money from him.”
Mr Glynmor Jones said Chapman had approached the 73-year-old man as he was leaving a public lavatory at Wallasey, accused him quite wrongly of being there for an ‘immoral’ purpose and threatened, as a police officer, to arrest him.
Chapman emphasised to the old man the publicity his arrest would attract and indicated that he would forget the whole thing for a fiver.
More demands for money were paid until August 24, when the victim found another note demanding money. He went to the police and arranged with them that he would pay over the blackmail cash in marked notes.
The old man handed the money to Chapman behind the library in Earlston Gardens, Wallasey. Police officers then arrested Chapman.