WASHINGTON (CBSDC/AP) — The District of Columbia Board of Elections is launching an investigation after an advocate against voter fraud went into polling places and began the process to vote under Attorney General Eric Holder’s name.

The elections board said Tuesday that evidence of potential criminal activity from last week’s primary will be referred to law enforcement.

The investigation stems from undercover online videos by activist James O’Keefe’s Project Veritas. The group also has made undercover videos targeting Medicaid, NPR and community organizing group ACORN.

In the latest video, an O’Keefe associate tries to vote as Holder at a Washington polling station. The city doesn’t require IDs to vote, so the poll worker verifies the name spelling and address before offering a ballot. Then the activist insists on leaving to get an ID.

“What is troubling is that someone who purports to be concerned about the integrity of the voting system would in fact perpetrate a fraud,” Election Board member Devarieste Curry said. “Whether that fraud is prosecutable remains to be seen, but it was a fraud nevertheless. We want every voter to know that no vote was cast in any of the incidents depicted in this video, that we condemn this stunt, and that we will thoroughly investigate it, as we customarily investigate all reports of irregularities before we certify the outcome of an election.”

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