There are the usual unfortunate banana-related puns in the Seattle Post-Intelligencer's report on this incident, and I am sparing you those, but it does contain the excellent sentence: "The banana costume was seized as evidence."
The incident also involved shotgun-brandishing and indecent exposure, but was otherwise fairly straightforward.
For prior instances recounted here of bananas behaving badly, see "Police Stop Knife Fight Involving Banana Boy," and "Seven-Year Sentence for British Fruit-Wielding Bandit."