A Pennsylvania prison inmate with a penchant for writing threatening letters prompted Volusia County sheriff’s deputies to evacuate the DeLand, Florida courthouse mailroom October 18 because of one of his letters, a sheriff’s spokesman said. The inmate is serving a long prison sentence in Pennsylvania, said a sheriff’s spokesman. “The letter alleged that bombs had been placed in several courthouses around the state, and DeLand was one of them,” the spokesman said. “I don’t know that he has any particular connection to DeLand.” Deputies with bomb detection dogs were sent to the courthouse at noon. A dog hit on a package but it turned out to be a delivery to the courthouse’s information technology office, which had a substance in it detected by the dog, the spokesman said. He said the mailroom and offices around it were evacuated in an “abundance of caution.”