The arrest happened during the town's Santa Claus parade Tuesday night.
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Santa, Mrs. Claus and the Grinch helped spread some cheer to the tiny babies and their families.
Special guest appearances include Santa and Mrs. Claus, The Grinch, Santa's reindeer, and many more.
Indiana State Police says it caught the mean one himself.
The Whitestown Police Department says someone who looks like the Grinch will make appearances around town -- and the public should snap his pic and post it to social media.