Investigators say the man seen doing drugs in the video used to head the Marion Police Department, in Southwest Virginia.
In the video, it appears Michael Roberts is pulling a green plate and a spoon out of the cabinet and sitting down at the table.
He then crushes up pills for himself, before snorting the drugs while a hidden camera records everything.
Roberts was fired after he was accused of stealing drugs from the evidence locker to sell to friends.
He has since plead guilty to those charges.