Published: May 11, 2010 4:05 AM EDT

PUNTA GORDA, Fla. - Crews have given the all clear after a hazmat scare Monday in Charlotte County.

First responders arrived at the Clerk of Courts office on Marion Street in Punta Gorda, just before three Monday afternoon.

Officials say an envelope containing a white powder and somehow made it from the clerk's office to the truck of a deputy's car.  A sheriff's office spokesperson says it appears the envelope came from an inmate who sent back medication he didn't want to take.  Fire crews say the case is being handled like any other suspicious event.

Fire officials and the health department say the powder hasn't been officially identified and will be sent to an office in Tampa for tests.  No illnesses were reported from the mystery powder.