A mysterious donation has created some unwanted controversy in the race for Clarkstown town supervisor in Rockland County.

An ad to benefit George Hoehmann's campaign against Democrat Alexander Gromack was paid for by the Reform Party The party got the money for the ad from Municipal Safety Research LLC.

The money trail appears to link back to Westchester County Executive Rob Astorino. Astorino created his own political party called Stop Common Core last year when he ran for governor. He later renamed it the Reform Party. According to documents, it got just one donation: a $107,000 check from Municipal Safety Research LLC.

The company has no website or published phone number, and does not appear to be registered with the state.

The company did list an address at 50 Main St. in White Plains. News 12 went to search for it, but suite 301 was nowhere to be found.

There was a suite 390 in the building, which is a law firm run by Rockland GOP Chairman Lawrence Garvey, who supports Hoehmann's campaign.

Richard Orsillo, who runs Gromack's re-election campaign, says they are now calling for a full investigation by the New York attorney general.

Hoehmann's camp says they are not legally responsible since they didn't directly pay for the advertisement.