Motorcyclist Reggie Chance turned himself in to Manhattan 's 33rd Precinct on October 4 .
Motorcyclist Reggie Chance was identified as the one who broke Lien 's window with his helmet .
Motorcyclist Reggie Chance , who was identified as the one who broke Lien 's window with his helmet , turned himself in to Manhattan 's 33rd Precinct on October 4 .