By Brad Edwards

CHICAGO (CBS) — It’s the robo call one candidate calls character assassination.

It’s a political race that wouldn’t typically grab the spotlight: Local School Council at Chicago’s Amundsen High School. It’s a volunteer position that Bill Helm has held since 1996.

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The anonymous robo call attacking Helm, which was blasted to residents earlier this week, says in part: “The corrupt political hack Billy Helm is not someone you want around your children. Our investigation revealed that Billy Helm was arrested seven times in recent years.”

“It was like a bolt from the blue,” said voter Gloria Dallmeier, who got the call. “I was thinking they were pretty extreme charges.”

Bill Helm, a political player and supporter of former Ald. Eugene Schulter, does have one offense dating back to 2001 – per our records search.

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“It’s a lie. It’s not only appalling, it’s offensive to me and my family,” Helm told CBS 2’s Brad Edwards. “It’s slanderous. It’s a low point for elections that I’ve ever been involved with.”

The call erroneously ends: “Please vote Wednesday at Amundsen High School for anyone except corrupt political hack Bill Helm.”

The election is today and the polls close at 7 p.m. Seven individuals are vying for the two spots.

So who is behind the calls?

We don’t know.

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The Illinois State Board of Elections said the calls weren’t part of their jurisdiction. A call to the FCC was not returned.

Brad Edwards