So far I have yet to see what the outstanding warrant was for.
I haven’t seen anything officially confirmed. But, I have seen some twitter chatter than he had been arrested in February on ‘aggravated robbery’ charges. It’s unclear if the outstanding warrant (possible multiple warrants, btw) were connected to that earlier arrest. It doesn’t take a great deal of imagination to see how he gets arrested, makes bail and never appears in court resulting in a new arrest warrant being issued.
Aggravated robbery is of course committing robbery with some kind of weapon, though not necessarily a firearm but could be a firearm.