The driver of a tour bus that crashed in the Bronx in 2011, killing 15 people, was exhausted and driving only after a few naps, according to a new federal report.


The National Transportation Safety Board said today that Ophadell Williams had nearly no sleep in the three days leading up to the March 12, 2011 crash.


He only took naps while passengers gambled in a Connecticut casino, according to the Associated Press.


The bus careened off Interstate 95, and a support pole sliced through the entire vehicle.


Williams was charged with manslaughter and criminally negligent homicide.