What does Drop Piece mean?

Drop Piece meaning in Urban Dictionary

a gun, usually low priced and achieving the serial figures removed, which is used to kill somebody and left or "dropped" within scene associated with criminal activity in order to prevent any contacts using the perpetrator and weapon used in the crime.Sometimes a fall piece could be a weapon that's been taken from some body; therefore the serial numbers will have no chance of being tracked to the perpetrator.A fall piece may be carried by a police officer to plant on people after they happen shot by said officer to justfify a shooting.