Last month Soulja Boy was involved in a hit and run mystery involving a motorcyclist in LA [click here if you missed that].
Turns out it wasn't actually Soulja Boy but it was his car...
Police have arrested Abrahim Mustafa ... we're told he's one of Soulja Boy's hangers-on. He's a rapper who goes by Arab. He's been arrested for felony hit-and-run.
We're told cops still want to speak to Soulja Boy.