A person's race should not be defined in the opening line including their name. Its bad form to do so even with racial undertones. WP:LEAD and WP:MOSBEGIN are pretty clear. We describe the event with care to specifics. Not confuse matters with the ethnicity makeup of the individuals. I do not know of another article which puts so much emphasis on race background as this. It also should have the location and circumstance; which was not properly done. As for unarmed it is undue; while true given reports that Martin went for Zimmerman's gun and the entire altercation is still being released. He may have been unarmed, but that should not be noted before his activities. It should still be there, it wasn't perfect, but the second paragraph was a section that belonged in the police matters, not in the lead. Shortening it to two paragraphes tightened it by having one for the incident and one for the response it triggers; all of the information to be found within.