By George P. Hassett

The embattled Register of Probate accused of stealing cash from government copy machines resigned today.

John Buonomo, who was indicted last month for allegedly stealing thousands of dollars a month from copy machines in the Register of Deeds office, told The Somerville News today he is resigning from the $110,000 a year job to clear the way for an investigation. He has denied the charges.

Buonomo would not provide any further information. On Aug. 6 he was charged with 18 counts of breaking and entering into a depository, eight counts of theft of public property by a public official, and eight counts of larceny under $250.

Buonomo was up for reelection this year. It is not immediately clear how his resignation will affect his status as the only Democrat on the ballot for the primary. Since the arrest, three candidates have declared for the office — Ward 5 Alderman Sean O’Donovan, Newton attorney Thomas B. Concannon and Arlington attorney Paula Mattaliano.

Buonomo faces up to 20 years in prison if convicted of the breaking and entering into a depository charge. He has a long history in Somerville. He was first elected to public office in the city in 1979 when he was elected to the school committee. He then served as the Ward 4 alderman and ran unsuccessfully for mayor in 1989 and 1999.