He had many reasons to run, like have been stated already. I personally know a guy who was accused of running from a cop that was driving the other direction. Then flipped a u turn and took off after the biker and claimed he was running. He spent 2 days in jail and had to go to trial. His bike was towed and impounded. For which he had to pay. The only thing they were able to convict him of was that he was speeding, cuz he admitted to it, while he was in a flow of traffic. And what was he doing...nothing riding along with his friend next to him. So yes the kid, had many reasons to run from. Did he deserve to die from it, hell no. Officer training says they are suppose to get in front the vehicle and slow them up. But a bike...cmon they shouldn't be doing that.
Should the biker have been running? Maybe not, should the officers have been chasing? Not really.
"Under our system of government upon the individuality and intelligence of the citizen, the state does not claim to control him/her, except as his/her conduct to others, leaving him/her the sole judge as to all that affects himself/herself." Mugler v. Kansas 123 U.S. 623, 659-60.
Should the officers have been chasing? No, there was no crime
"For a crime to exist, there must be an injured party. There can be no sanction or penalty imposed upon one because of this exercise of Constitutional rights."- Sherar v. Cullen, 481 F. 945.
"Where an individual is detained, without a warrant and without having committed a crime (traffic infractions are not crimes), the detention is a false arrest and false imprisonment." Damages Awarded: Trezevant v. City of Tampa, 241 F2d. 336 (11th CIR 1984)