A Nevada man  has been sentenced to 18 months in federal prison for mailing a powder letter to the Nevada Schools. Mondell V. Olson’s prison time will be followed by three years of supervised release for the offense of false information and hoaxes.

In March 2018, Olson mailed an envelope addressed to a teacher at the Nevada Schools. Inside the envelope was a white powdery substance, and a note indicating the substance was anthrax. The investigation revealed the substance was not toxic. Olson admitted to sending the teacher the envelope. Olson was previously convicted of harassment charges in Story County for leaving threatening voice mails with the Nevada High School and a teenage student at the school.