The mystery is not clear
This is an interesting story premise in that it doesn't seem interesting at all - the facts seem pretty obvious. Who among us doesn't know a kid from school with more money than sense who destroyed a fancy car? Luckily, no one from my high school died, but certainly no one investigated what happened in the accident - so why isn't it super obvious that some douchebag rich kid got a little overexcited and someone died?