Teenager 'killed couple and tried to bite face off husband'

A 19-year-old student with no criminal record fatally stabbed a couple at random in their garage, wounded their neighbour and was biting the dead man's face when deputies finally subdued him, authorities in Florida said.

Florida State University student Austin Harrouff may have been on hallucinogenic drugs when he attacked Michelle Mishcon, 53, and John Stevens, 59, at their Tequesta home late on Monday, Martin County Sheriff William Snyder told reporters.