Grim-faced Johnny Knoxville leads the mourners at memorial service for Jackass star Ryan Dunn

-Controversial church plans to picket public funeral later this week -Memorial comes as toxicology results reveal Dunn was more than two times over the drink-drive limit but no suspicion of drug abuse -He had been driving at between 132mph and 140mph-Star had notched up 23 driving convictions - including ten for speeding - before accident -Pilferers collect ghoulish mementos from crash scenes and