An Arizona man was charged with murder after police say he veered off a highway and fatally stabbed his female passenger.
Fernando Acosta, 25, was arrested Friday and charged with premeditated murder in the first degree and aggravated assault resulting in serious physical injury after allegedly fatally stabbing Martha Thy. The woman died in a hospital after being stabbed or cut about 20 times. A witness with a gun fired shots at the ground to try to scare the attacker. Another witness eventually tackled the suspect and knocked the knife from his hands.
Acosta remained jailed Saturday on suspicion of premeditated first-degree murder and aggravated assault. The motive for the stabbing is not known.