The maniac who fatally stabbed a 14-year-old Bronx boy in an unprovoked incident was also responsible for slashing an innocent bystander in a subway station, police believe.
An image of the cold-blooded killer was obtained from surveillance video and was blasted out to officers who are hunting for the suspect, Chief of Detectives Joseph Kenny said at a late Friday news conference.
Caleb Rios, 14, was standing on the sidewalk on East 138th Street near Lincoln Avenue in Mott Haven around 9:25 a.m. Friday when the killer plunged a knife into his chest twice, authorities said…