Student accused of chewing on murder victim's face 'did not take hallucinogenic drugs'

A Florida college student accused of randomly killing a couple and chewing on the dead man's face had no detectable hallucinogenic drugs in his system, the FBI has said.

Austin Harrouff had a trace amount of marijuana in his system when he allegedly beat and stabbed John Stevens, 59, and his 53-year-old wife, Michelle Mishcon, outside their Tequesta-area home on August 15, according to the FBI toxicology report.