There are a few defenses to any kind of robbery charge. There are the “I didn’t do it at all. I am the wrong person or I’ve been misidentified” defenses. Then the defenses related to force like “I didn’t have a weapon, there was no force involved, I didn’t make an actual threat but instead I asked for it and got it” then of course a defense that the property was actually yours to begin with or it wasn’t taken from the possession of another person. The strategy in any criminal defense case is to try to find what seems to be missing in the elements of the charge, and then kind of work your way into that. It’s not so much what’s there, it’s what isn’t there