Former state Rep. Brian Wallace, a South Boston Democrat, was indicted Thursday of campaign finance violations, the state attorney general said. His campaign treasurer, Timothy Duross, was also indicted.

They were charged by a Suffolk County grand jury for failing to report $6,345 in campaign contributions in 2008, or 17 percent of the former state representative’s haul. In 2009, the Office of Campaign and Political Finance opened an investigation that was eventually referred to Attorney General Martha Coakley.

According to Coakley’s office, Wallace and Duross were unable to provide backup documentation about reported campaign donations and expenditures when asked. Candidates and treasurers are required to maintain records for campaign expenditures for six years after an election.

Wallace, 61, declined to run for another term last year. A staunch proponent of casinos, he had served in the South Boston-based seat since 2003. Duross, 50, had been his treasurer since 2001.

Wallace could not be reached for comment. His former district includes a piece of Uphams Corner and Harbor Point in Dorchester.

Wallace's attorney Bill McDermott said in an emailed statement, "Former State Representative Brian Wallace restates his innocence of any criminal acts alleged by the Attorney General and restates his contention that this charge should be settled in a civil disposition with the Office of Campaign and Political Finance. He looks forward to his opportunity to clear his good name."

When he decided to step down last year, Wallace noted that he had worked on legislation dealing with substance abuse prevention, film tax credits, and naming a courthouse in South Boston after Judge Joseph Feeney. “I accomplished what I wanted to accomplish,” he told the Reporter in March 2010.

In a statement, Attorney General Coakley said, “Candidates and their treasurers are required by law to accurately record campaign contributions and preserve all records of expenses. These laws are critical to the integrity of our campaign finance system, ensuring greater transparency and protecting against the misuse of campaign funds. We allege that Mr. Wallace and his treasurer failed to properly record thousands of dollars in contributions and expenses in direct violation of those laws.”

SEE ALSO: From the Reporter archives, "Wallace makes it three reps leaving."