We are talking Louisiana here. Marijuana is a CDS here Sch. 1. In this story the two guys went there to buy a Sch. 1 drug. Just because there were no drugs found (at least in his side of the story) doesn't mean the intent wasn't there.
Louisiana RS 14:30
§30. First degree murder
A...
This sound a lot like a case here in Louisiana that went down in Clinton, LA.
Since I don't have the the required 10 post I can't post the link to the Open Carry forum that's in.