From the NY Post:
A Queens man was stabbed in the heart last night while trying to rescue his little brother from a group of knife wielding thugs on a J train platform.
Dario Paiva, 27, raced to his brother Khristian’s side after the younger man was beset by four attackers near the 85th Street-Forest Parkway station, only to meet his doom.
The Woodhaven man was fatally stabbed around 11:30 p.m. after confronting his brother’s attackers on the subway platform. He was pronounced dead on arrival at Jamaica Hospital. No arrests have been made.