Bullshit. Prosecutors like their 100% conviction rates, to the point where they lie to judges, manipulate evidence, etc. http://www.propublica.org/article/who-polices-prosecutors-wh...

There are plenty of crimes that don't leave particularly useful evidence. Pointing a gun at someone is illegal, but how do you prove it happened? Same issue in many rape cases.

Cops in some areas also have a history of suppressing reporting and/or evidence to keep crime statistics down. http://en.wikipedia.org/wiki/Adrian_Schoolcraft

Since more recently published court documents have shown this to be a sexual assault / rape and domestic violence arrest, some statistics are in order.

Particularly relevant is the fact that only 14-18% of sexual assault cases are prosecuted, or 37% for rape alone. http://www.uky.edu/CRVAW/files/TopTen/07_Rape_Prosecution.pd...

Given that, it would actually be highly unusual if he DID go to trial.