From one POV, DS is correct.
Talk to pretty much any lawyer about any action and you will get a response along the lines of "If you take that action, you risk legal repercussions." You can be entirely legal, follow the guidelines of major associations, be extremely conscientious, and still find your ass in court. You still risk legal action by the legal lottery players and those with an excess of legal training and a deficit of ethics and morality. BTDT. [Shakespeare was wrong. He should have written, "The first thing we do, let's kill all the lawyers...and then their children as an example to the others."]
There is no way to assure you won't find yourself afoul of a lawyer in a civil case or a prosecutor in a criminal case. Any action more vigorous than climbing out of bed increases the chance of being a target. Since the legal system is run by lawyers for their benefit above all else, we see suits and charges run riot much longer than any reasonable system would allow.
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Basing the strength of Z's case on the dearth of pre-trial motions to dismiss or SYG hearings is either ignorant or disingenuous. The local DA and local LEOs saw the set of facts and decided not to charge. After a racial shinola storm that included the POTUS grunting about it, another prosecutor was brought on by the most powerful political figure in the state and ordered to get the right answer. This prosecutor gathered no more evidence than the previous one did before he charged Zimmerman with murder. Also, the original judge was so obviously biased, he was removed. The likelihood that Christ Himself would prevail in a SYG hearing or motion to dismiss given that environment approaches zero. Saying Z has a poor case based on it is ignorant or disingenuous, again.
This far in the Zimmerman trial, the prosecutor has yet to provide a credible witness that challenges Zimmerman's story. Several state witnesses bolster his story. The "star witness" with the most damaging story relative to Z turned out to be a lying, perjuring, resentful, dunk-driving pothead half-wit with a new story for every occasion. And those are her good points. This is the witness DS cites every other post as providing damning testimony.
I thought that perhaps the author whose digests I read was slanting it in Z's favor. See, I, too, had gotten some of the MSM/race-huckster inkcloud in my eyes. Watching the videos set me straight. Great Sex-Positive Cthulhu on roller skates.
Thus far it looks like the prosecution doesn't have squat and is hoping the jury is too scared or intimidated to acquit. If they were looking to posthumously convict Martin of assault, they might have a substantive case.