Sounds like something from a b rated zombie movie.
"A witness says a naked man chewing on the face of another naked
man on a downtown highway ramp kept eating and growled at a police
officer who fatally shot him to make him stop."
"Vega flagged down a Miami police officer, who he said repeatedly
ordered the attacker to get off the victim. The attacker just picked his
head up and growled at the officer, Vega said. "
"As the attack continued, Vega said the officer shot the attacker,
who continued chewing the victim's face. The officer fired again,
killing the attacker. "