RENSSELAER, N.Y. (NEWS10) — Rensselaer Mayor Mike Stammel has been interviewed by New York State Police as part of an investigation into alleged ballot fraud in the November election.

NYSP interviewed Stammel at City Hall on Tuesday, and they seized his cell phone.

Stammel told reporters on Wednesday that he was unsure what evidence investigators are expecting to find on his phone.

Allegations of ballot fraud first came to light shortly after Election Day and before the race was declared. Stammel, the incumbent, edged out his democratic challenger Richard Mooney.

His win was recently certified by a judge despite Mooney asking the court to throw out a number of absentee ballots, claiming fraud.

Stammel is also the chairman of the Rensselaer County Legislature.