(AP) — A 61-year-old man has been sentenced for mailing a threatening communication to Mutual of Omaha in Nebraska.

Federal prosecutors say David Naylor, formerly of Perrysville, Ind., was sentenced Tuesday in Lincoln. He was ordered to spend another day in custody, serve 100 hours of community service and pay restitution of more than $1,800. Naylor also must serve three years of supervised release. Naylor already has spent 54 days behind bars awaiting prosecution.

Prosecutors say that on May 14, 2012, the Mutual of Omaha mail facility in Blair received an envelope that had been mailed by Naylor. The envelope contained a white powder. A message on the outside of the envelope said: “Open carefully contains cornstarch.”

Four workers had to remain in place until experts determined the powder was not harmful.