The Bexar County Medical Examiner’s Office identified the motorcyclist as 64-year-old Kyle Wayne Perry who died at the scene due to blunt force injuries. Three vehicles in front of Perry were also impacted in the wreck, causing a Jeep Cherokee to roll over, police said.

The truck, which had a flat-bed trailer attached to it, attempted to brake before impact and jack-knifed on the highway, blocking both eastbound lanes. The driver of the tractor-trailer fled the scene on foot and did not render aid, police said.