If an armed man breaks into my home and I attack him, can he shoot me and claim self defense? [View all]

[Nine]

Similarly, if I am walking down the street in my own neighborhood, committing no crime, and an armed man chases and confronts me... if I try to fight back, can he shoot me and claim self defense?

There's no dispute that Trayvon Martin was committing no crime.
There's no dispute that Zimmerman chased him - he admitted doing so in the 911 call.

If you commit a crime, you have no right to act in "self defense." If you are armed and you chase an innocent, unarmed minor down the street, I say you also have no right to claim "self defense."