Crystal Lake police responded Wednesday just before 1 p.m. to Canterbury Elementary School for a reported indecent exposure.
Jack Glauner was gone before police arrived, but patrol units found a vehicle matching the description a witness provided.
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Glauner was arrested and charged with public indecency - lewd exposure near school grounds and disorderly conduct, police said.
He was taken to the McHenry County Jail.
Anyone with information on the incident is asked to call the Crystal Lake Police Department at 815-356-3620 or text the word CLPDTIP along with the tip information to 847411.