A threat of an anthrax attack at the Linn County Courthouse Monday turned out to be a threat, Linn County Sheriff Tim Mueller said Monday afternoon.
The Linn County Courthouse was closed all day Monday due to security concerns after envelopes were discovered threatening anthrax contamination.
According to Mueller, at about 6:17 a.m. Monday morning a custodian opening the courthouse found a note written on an outside entry door and envelopes nearby. The note indicated…