Logan Paul says his brother Jake Paul did NOT steal anything during a looting incident at a mall in Arizona -- but he's slamming his lil' bro for being there in the first place.
"Jake didn't loot," Logan said while carrying a Black Lives Matter sign in L.A. on Tuesday with his girlfriend Josie Canseco.
"Should he have been there? Absolutely f**cking not. But my brother didn't steal anything."
The incident in question went down Saturday night at Fashion Square in Scottsdale, Arizona -- where looters went after tennis shoes and pretty much everything that wasn't nailed down.