The cops didn't take his gun. He presumably still has it.
So, yes, armed and dangerous.
The only thing worse than the misery pimps who are using this for political purposes is the spectacle of those who, in attempting to oppose the misery pimps, end up claiming that Zimmerman did nothing at all wrong and invent secondary and tertiary hypotheses to explain away his lack of common sense, restraint, and ignoring both police and Neighborhood Watch guidelines, all of which resulted in the death of someone the police say had been doing nothing wrong.
You’ve done a wonderful job of convicting Zimmerman while assiduously ignoring the most important piece of evidence: Zimmerman, corrorborated by at least one witness, has stated that he boke off his attempted pursuit of Martin and was returning to his truck when Martin jumped him. Even under a “stand your ground” law an assailant is not justified in attacking his adversary once the adversary has broken off the confrontation. At that point the onus is on the assailant, which Martin appears to have been. That, along with Martin’s brutal assault on him, gave Zimmerman the right to use lethal defensive force.