Officers were so outraged that a tin of biscuits vanished from their police station that they reported it as an official crime.
Details of the theft are still unclear but it is thought a police officer could be responsible for an inside job at the station at Heavitree Road in Exeter, Devon.
The biscuits were last seen in the control room kitchen.
The audacious crime at Devon and Cornwall Police's headquarters, right under officers' noses, was logged on February 28, 2012 - and remains officially unsolved.
The biscuits were among a bizarre list of property recorded as stolen from police stations in Devon and Cornwall in 2012.
They include a lace dress, hair tongs, two reflective vests and the petrol cap off a panda car.
Stab jackets, a set of car keys and eight DVDs were also reported missing - but none of the 28 items have ever been recovered.
Thefts recorded by the same force in 2011 included a betting slip, an unwritten parking ticket and a fleece jacket.
Crime scene: The Exeter police station where the biscuits disappeared
A spokesman for Devon and Cornwall Police said staff are encouraged to report stolen goods regardless of value.
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He said: 'In the spirit of openness and transparency these details are recorded and made available to the public through Freedom Of Information requests.
'In the case of the biscuit tin it was recorded as a theft in the workplace but no formal investigation took place.'