SAN FRANCISCO (AP) - The director of a skydiving certification group says the instructor who led a tandem jump in Northern California that turned fatal didn't have the advanced parachuting certificate required by federal regulators.
  Â
The only organization that certifies tandem-jump instructors says it has no records for 25-year-old Yong Kwon, who was killed with 18-year-old Tyler Turner on Saturday when their parachute didn't deploy over Lodi, California.
  Â
Ed Scott of the United States Parachute Association says the agency searched it records using several variations of Kwon's name and found nothing.
  Â
Scott said skydiving schools are responsible for ensuring their instructors are properly certified.
  Â
Bill Dause, owner of the Central Valley's popular Parachute Center that arranged the jump declined comment.
  Â
Turner's mother on Thursday called for an investigation.
(Copyright 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)
