TULSA, Okla. - Jail officials still don't know what a white, powdery substance found in an envelope sent to an inmate at the David L. Moss Correctional Center in downtown Tulsa is.
Jail officials were going through the daily mail shipment on June 26th and were opening all letters sent to inmates which is standard practice at the jail.
One of the workers opened an envelope that contained a second envelope. That second envelope contained a white, powdery substance.
Tulsa County Sheriff's Major Shannon Clark tells KRMG that deputies were unable to determine what the powder was which prompted a call to the Tulsa Fire Department's hazmat team.
Hazmat tests came up negative so the powder was sent to a lab in Oklahoma City.
KRMG has learned that the compound tested negative for any biological chemicals as well as any chemicals that could be hazardous to humans or the environment.
There has been no conclusive test that has yet to determine what the powdery substance was.
Clark says the Tulsa County Sheriff’s Office is still investigating where the letter originated in an attempt to identify the sender’s motive, intent and what the substance is.