Police have identified the bicyclist who was killed after being hit by a semi-truck as 58-year-old Darwin Barve of Hilo.
KITV4 sources say Barve is the half-brother of Big Island Mayor Billy Kenoi.
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Police say a pedal on Barve's bike may have struck something and caused him to fall into the path of the semi.
The incident happened on Route 19 near the three-mile marker on Saturday. Barve was taken to the Hilo Medical Center where he later died.
A negligent homicide investigation is underway.