The sick suspected stabber – a mentally ill homeless man with eight past arrests in New York City alone – was stopped by a hero cop thanks to the help of good Samaritans, including a cab driver

A man has been taken into custody after allegedly killing three people in an apparent unprovoked stabbing spree in Manhattan, authorities said. Ramon Rivera, an undomiciled man of 51 years old, was charged on Monday with three counts of murder in the first degree, according to the New York Police Department.