What we know: Around 3:30 p.m. Monday, a school bus carrying 37 children slammed into a tree, flipped over and split apart. Families are mourning the five killed, and several children remain hospitalized in intensive care. The driver has been charged with vehicular homicide and reckless driving. Authorities say the bus was exceeding the 30-mph speed limit.
What we don't know: How fast was the bus going? Why did the bus crash? What, if anything, affected the driver? What could have prevented the crash?
Investigators say they have a great deal of evidence to compile and process, including videos and interviews with the children and other witnesses. Investigators will also review videos from the two cameras on the bus -- one rear-facing and one forward-facing -- and an informational box on the bus to determine what caused the crash. ...
What we know: Walker received his commercial driving license in April, according to the NTSB.
In September, Walker was driving a school bus when he hit another vehicle, causing minor damage. The accident report cited Walker for "failure to yield right of way." The driver in the other vehicle, in an interview with the Chattanooga Times Free Press, alleged that the school bus went through a stop sign and scraped her car. Also in 2013, Walker was cited for failure to show proof of insurance. His driver's license was suspended for three weeks. It was reinstated in late March 2014, according to state records.
What we don't know: What kind of vetting and training did Walker go through to become a school bus driver? How did the bus company investigate the September incident that Walker was involved in? Have there been prior complaints or issues reported about his driving to the company? ...
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