His cause and manner of death have not been determined at this time.
Wolliver was transported to the hospital with life-threatening injuries Tuesday morning after he was hit by a van on state Route 4 near Webster Street.
He was riding a bike on the right shoulder when he apparently lost control and drove into the road, according to a crash report filed by Dayton police said.
Wolliver was hit by a 2012 Nissan NV, which threw him from the bike and in front of the van, investigators at the scene said Tuesday.
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