Investigators are saying what caused the State Crime Lab to shut down, was a prank.
What had been called a "suspicious brown liquid" found in an employee's office at the lab has been identified as processed deer urine.
For nearly two days, officials tried to find out what the stuff was.
It had prompted evacuation of a building, decontamination procedures for several state workers and even resulted in the National Guard getting involved with a mobile lab.
Officials with the Cabinet for Health and Family Services say they'll let the Kentucky State Police determine how the urine got there.
Processed deer urine is used to conceal the scent of deer hunters and is sold commercially.