An election worker in the Grand Rapids area was charged with two crimes after a witness reported seeing him place a USB flash drive into an electronic poll book at the close of the Aug. 2 primary, authorities said Wednesday.

The incident had no impact on election results in a Gaines Township precinct, though it was "extremely egregious and incredibly alarming," Kent County Clerk Lisa Posthumus Lyons said.

"It is a violation of public trust and of the oath all election workers are required to take," Lyons said.

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James Holkeboer was charged with using a computer to commit a crime and falsifying records, the county prosecutor said.

Detroit, Grand Rapids, Ann Arbor news

A Michigan election worker was charged with two crimes after a witness saw him insert a USB flash drive into an electronic poll book at the close of the Aug. 2 primary.

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Holkeboer couldn't immediately be reached for comment. It wasn't known if he has a lawyer who could respond to the allegations.

The electronic poll book contains voter registration data, including confidential information, Lyons said.

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She said the poll book was not connected to vote tabulation equipment or the internet.