....Newspapers reported in October 1932 that he was a 50 year-old police constable with the Cambridge Police Force, and at Cambridge Assizes was sentenced to five years' penal servitude after pleading guilty to 30 charges of housebreaking, burglary and larceny over a two years period. ....During the ABW he had also been sentenced to five years' penal servitude for striking a superior officer on active service, but had only served part of the sentence. In 1909 he joined the Isle of Ely Police Force, transferring to the Cambridge Borough Police in 1911. He was called up in 1914 and served overseas from October that year to January 1918, was mentioned in despatches for meritorious conduct in the field, and when discharged in 1918 he rejoined the Cambridge Police. ....He had been reprimanded in Cambridge for being drunk on duty, and proceeded against for wearing medals to which he was not entitled. Doyle was discharged from the force in July 1932, having served 23 years and 123 days as a constable. ....It was said at his trial that he had a complete set of duplicate keys and would enter business premises when on night duty, on the pretext of looking for burglars. Eventually he was caught by his fingerprints being compared to those taken from a window pane in a 1930 burglary.