And state troopers alleged that Mr. Roach offered them Rolex watches and other incentives to emphasize money seizures in drug cases. State law allows such funds to be split between the law enforcement agency and prosecuting attorney's office.
At the time of his arrest, authorities said, Mr. Roach alone controlled bank accounts with at least a half-million dollars in seized drug money.
None of the federal charges against Mr. Roach involved financial misconduct. It is still possible that Mr. Roach could face state charges, though no decision is expected until after Gov. Rick Perry appoints a successor.
Federal and state prosecutors declined to discuss the specifics of their investigation, including how Mr. Roach began using methamphetamine or how he got it.