Frankly, I am not sure the police officers spotted the image, but it is now being removed from cruisers with about 30 vehicles that have already been changed.
It may be a bit easier to spot on the 16-inch door decals and there is an investigation afoot. I am not sure what would happen to the inmates. While they could allege destruction of property, it would be a rather novel charge since the inmates created the property in the form of the design. They could, however, cite the costs to the vehicles which will now have to be stripped of the decals. The other provisions of the Vermont criminal code do not appear to fit this criminal Rorschach exercise. Of course, the inmates would clearly face correctional charges and loss of privileges.
Answer: look at the spots on the cow.
Source: Boston