The mistake occurred as part of an investigation into John Walsh and Charles Martin, partners in now-bankrupt One World Capital Group. The foreign-exchange trading execs had been indicted for their alleged involvement in a scheme to defraud customers of $15m in funds.
The official sent out a copy of the complaint listing the criminal charges against the men, in which sources of information had been made anonymous. However, the sender had included a second document containing the names of the witnesses.
After the gaffe was discovered, the attorney's office hurriedly sent out a second email asking journalists to discard the information.