Symbolism.

Im gunna go with the top left picture. I think it symbolizes that even good people can have bad things happen to them. Like the po po shootin the chicken. However it could symbolize that the po po shoot at chickens, which could mean that they should only have tazers and not guns. Either way the po po are doing something wrong, including the hat. The hat is a definite negative on the coolness scale. Nobody wears abe lincoln hats anymore.