Autopsy shows no signs of heavy alcohol use , investigator for driver 's family says . Investigator says Diane Schuler not known as heavy drinker . Schuler , 7 others killed in head-on collision as she drove wrong way on parkway . Comment:
Autopsy shows no signs of heavy alcohol use , investigator for driver 's family says . Investigator says Diane Schuler not known as heavy drinker . Schuler , 7 others killed in head-on collision as she drove wrong way on parkway . Schuler had high levels of alcohol , marijuana in system during crash , officials say .