Was hip-hop impresario Marion "Suge" Knight involved in that deadly brawl at the Vibe Awards? That's what police and probation officials want to know. So they're reviewing tapes of the melee in which a chap who slugged Dr. Dre was stabbed, allegedly by one of the doc's prot&#233g&#233s. Knight and Dre, who cofounded the cheerfully titled Death Row Records in the early '90s, broke up professionally almost a decade later. Apparently, it wasn't a clean break, either: Upon Knight's prison release in '01, he was ordered to stay the heck away from Dre, near whom he sat at the awards show. Hmm...