Notice how the police are asking for anyone who witnessed the collision or saw the bike riding beforehand. Perhaps he was riding at an elevated speed at the time of the accident or maybe he wasn't, just because some slack-jawed cager saw him go past 5 minutes before doesn't mean *****. The cops are of course looking to blame the guy on the bike any way possible, instead of looking at the facts of what happened. What was going on beforehand (not immediately) means nothing.