Marine veteran charged with second-degree manslaughter for chokehold death of subway performer

Daniel Penny faces up to 15 years in prison if found guilty

Jordan Neely died 10 days prior after being held in a chokehold

New York law school professor views the charges as serious

Penny's attorney confident he will be absolved of wrongdoing

Mayor Adams did not call for charges, but accountability is key

Protesters call for justice as accountability brings change

City failed Neely, but charging Penny is a step towards justice