The article does not state whether or not the guns where legal, but it is probably a safe bet they weren't.
Even if he is charged for possession of an illegal firearm, what about the murder charge? The law does not seem to make an exception.
Guns is always legal. Guns do not go out and break laws. People break laws. When that happens, and the said people are convicted of breaking the law; those people are punished. Sometimes the guns get punished as well.
Even if he is charged for possession of an illegal firearm, what about the murder charge?
Please do not be deceived by the liberal parsing of words. This case is about killing an innocent person. Not about the "illegal possession of a firearm". An illegal firearm is one that has been modified in violation of statute, such as a sawed-off shotgun. Funny thing is, American Derringer sells derringers chambered for .410. With a 4" barrel from the factory. Cut your Mossberg down to less that 18" barrel/ 22" overall, and it becomes illegal to posses. Go figure.
Unless the firearms were machine guns or short barreled shotguns, they were probably legal. It's the possession of them by convicted felons that would be illegal.
Under the Constitutions of the United States, and of Florida, shouldn't be any such thing as an "illegal firearm". Not even the aforementioned machine guns and short barreled shotguns. The latter being very good for home defense.