Police say they are searching for a man who they say stabbed and killed a Brooklyn father who was trying to protect his teenage step-daughter.

The incident happened Monday night at 131 Dupoint St. in Greenpoint.

Officials say the victim, Zbigniew Truszkowski, ran out of the house to protect his step-daughter after she was being harassed by a man outside. They say Truszkowski punched the man, then another man who was with the suspect stabbed him.

Truszkowski, 37, died later that night from his injuries.

Neighbors who spoke with News 12 say they can't believe an incident like this happened in their community.