October 24, 2016 1:20 pm Speed, Fatigue Among Top Contributors to Bus Crashes A 2013 NBC4 I-Team investigation found that speed and sleepiness are among the top causes of casino bus crashes. Joel Grover investigates for the NBC4 News at 11 on Sunday, Oct. 23, 2016. US & World Videos 6:17 Workers' comp claim denied after nurse's coworkers fail to give CPR 3:37 Customers sue National General after claims denied 3:55 Unhoused Angelenos say the city is shuffling them around 2:41 Safety and staffing concerns within LA County Probation Department 2:22 Man arrested in fatal Metro stabbing was previously arrested for transit system attacks