Del. Tiffany T. Alston, the freshman state lawmaker known most for changing her position on same-sex marriage, has been indicted again for theft.

State prosecutors say they have uncovered evidence that she used taxpayer money to pay the salary of an aide working at her private law firm.

The indictment comes three months after Alston (D-Prince George’s) was charged with stealing campaign funds to pay for her wedding and using campaign funds to pay for the salary of a law firm employee. Alston denied wrongdoing on those charges.

The new charges allege that Alston arranged for an employee of her law firm to be hired by the state and “paid by the Maryland General Assembly at a rate of $100.00 per day,” according to a release Thursday from the state prosecutor’s office. “That employee, who was paid $800 by the State of Maryland in January 2011, never worked in Annapolis and continued to perform her regular law firm duties.”

According to state prosecutors, Alston wrote herself checks from her campaign account and cashed them to pay at least $3,560 in expenses for her wedding day. She also allegedly wrote herself checks to help pay the salary of an employee in her law firm.

The indictment follows a string of embarrassing moments in court for Maryland politicians in recent months, including the sentencing of former Prince George’s county executive Jack B. Johnson and his wife, Leslie, a former Prince George’s County Council member, and the conviction of former governor Robert L. Ehrlich’s campaign manager, Paul E. Schurick, for election law violations involving a 2010 Election Day robocall.

Alston’s case is scheduled to be heard May 14, 2012.

In the spring, Alston was a co-sponsor of a bill to legalize same-sex marriage but voted against the final legislation. It was defeated.