Details seem a little too sketchy for a definitive conclusion here.
Much like the Martin case though, the initial reports certainly favor a manslaughter case. Of course, we all know how unbiased the media reports this kind of thing.
		
		
	 
I don't think you get a jury to convict him, though, not at 2 a.m. in Louisiana, inside the guy's fence and next to his back door.
		
 
		
	 
The key is if he imposed an immediate threat.  I don't think he did.  From what I gather:
-  Kid was standing next to shooters car in his gate driveway after he hopped the fense.
-  Kid has history of burglaries and his brother even calls him a professional theif
-  Kid did not have a gun
I don't think he had legal justification to shoot the kid, but getting a jury of 12 people to all believe that is a challenge.  You break in to people's property and steal stuff, you put yourself at risk.  Zimmerman was a slam dunk acquital.  This one will be close.
ETA:  Seems there is an 
unidentified witness whose story conflicts with the shooter.  Depending on what the witness saw, it may be enough to convict, even deep in the south.