Chatting peacefully on the floor of a Nevada casino, a senior Hells Angels leader and a 27-year veteran of the rival Vagos motorcycle gang thought they had negotiated a truce between competing members who'd been itching for a fight at a weekend long biker festival. "Everything is going to be all right," the Vagos member recalls his rival telling him. "He said, 'I'm getting too old for this.' And I said, 'I'm getting too old for this too.'" An hour later, a brawl erupted and a shootout ensued, killing one of the highest-ranking Hells Angels in the country and wounding two Vagos members. More violence has followed the melee at the hotel-casino in Sparks on Sept. 23, but the longtime Vagos member told a grand jury in Reno earlier this month that the deadly gun battle was not part of...