@dyslexia,
Quote:I'm thinking the police first must determine that a crime has been committed before anyone is arrested.
Sgt Crowley determined that a crime had been committed, (creating a public nuisance or something similar) and arrested the person who he believed committed the crime (Gates).
The DA either believed a crime was not committed, that there wasn't sufficient evidence to prove Gates committed it, it didn't serve the interests of the community to pursue the matter, or that it was far too hot a political potato to handle and so the charges were dropped as, in my opinion, they should have been.