Let me treat you to a few of them and provide you with my responses to them.
The police should arrest Zimmerman. You mean the same police your side says screwed up the investigation?
The police should have called for a grand jury. One tiny problem: the police didn't determine a crime had been committed. For a grand jury to be convened, there had to be a crime. And, no, that's not based on your opinion.
Zimmerman is in hiding. In today's society, going into hiding is a difficult proposition. And with the media firestorm your side created, it's made even more difficult because everybody and their grandmother knows what Zimmerman looks like. Besides, aren't you Leftists supposed to be so smart? Surely people of your intellect can find one guy.
I'm not in Florida. They have these things called "airplanes" that will take you where you want to go for a certain amount of money. If you can't afford a flight, load up your Prius or your VW van and drive down there.
... [signifying utter silence]. I see. You make statements you refuse to back up with action.
Guess which one is the most common response from the cowardly Leftists.