John D. Williams III, the president of the Alexandria Taxpayers Alliance who was convicted Wednesday of failing to pay city taxes on his automobile, has been indicted on a charge of writing a bad check to a computer service company, according to Alexandria court records.

The Circuit Court indictment, returned earlier this month, charges Williams, 44, of 207 N. Pitt St., with writing a check for $4,488 to Systec Inc. "with the intent to defraud." If convicted, he could face up to five years in prison.

Williams, who was jailed briefly on the charge, said it was "a business matter and I'm not going to talk about it." A prosecutor who was in the courtroom when Williams appeared for a hearing on the charge, said Williams called it "ridiculous."

Steve Hansen, regional manager for Systec, located at 5200 Eisenhower Ave. in Alexandria, said the company was contracted by Williams to service computers at a government agency and that Williams had become delinquent in his account. Williams owns and operates U.S. Financial Services, a small computer consulting firm that advises prospective computer users on what equipment they should use.

A trial date is expected to be set next week.

Williams is appealing his conviction in General District court on charges that he had not paid $645 in personal property taxes and back fees on his car for the last three years.

The outspoken leader of the taxpayers group, Williams has said that that top-ranking city officials were out to get him because he persistently voices objections to their public housing and taxing positions. City officials have rejected Williams' complaints as unfounded.

Court records also show that Williams and his company are being sued by National Advanced Systems Corp. of Delaware for $23,707.68 for equipment maintenance and repair work allegedly performed last year. Williams declined to comment on the suit.