No drugs or alcohol were found in the system of the man accused of vehicular homicide in the crash of a Tennessee elementary school bus that killed six children and critically injured several more, police said on Wednesday.
Johnthony Walker, 24, was driving the bus full of students home from Chattanooga's Woodmore Elementary School on Monday when it veered off a road, flipped on its side and smashed into a tree and telephone poll, according to a police affidavit.
Officials said five children were killed initially: a kindergartner, a first-grader and three fourth-grade students. Police said on Wednesday evening that a sixth child had died.
Walker was driving on a narrow, winding road at well above the speed limit of 30 miles per hour (48 kph) when he lost control, leaving the bright yellow bus mangled and nearly severed in two, the affidavit said.