FREEHOLD, N.J. (CBSNewYork/AP) — The campaign manager for a New Jersey state senate candidate was responsible for an early-morning robocall that urged voters to support another candidate, prosecutors say.

Dwayne Horner, 45, of Little Elm, Texas, was indicted this week on one count of impersonation, Monmouth County prosecutors said. He faces up to 18 months in prison if convicted.

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Horner was the campaign manager for Leigh Ann Bellew, a Tea Party-backed candidate who unsuccessfully sought the Republican party’s nomination last year for the 13th Legislative District seat.

On the day the primary election was held, the robocall went out at 4 a.m. to registered Republican voters in the district. It urged them to vote for three incumbent GOP state lawmakers, including Bellew’s opponent.

“Hi. We are calling on behalf of Joe Kyrillos, Declan O’Scanlon and Amy Handlin to remind you, you can still vote til 8 p.m., another four hours,” the call said. “Remember to get out and vote. Thank you.”

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Prosecutors say the caller’s phone number was “spoofed” to appear it was coming from Monmouth County Republican Headquarters. An investigation determined that the voice on the calls was Horner’s, authorities said.

A telephone number for Horner could not be located Tuesday.

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