Gunman with possible revenge in mind kills two NYC police officers

A gunman ambushed and fatally shot two New York City police officers on Saturday and then killed himself, police said, and a social media post indicated it may have been in revenge for the police chokehold death of an unarmed black man.

If the killings do turn out to have been motivated by the death of Eric Garner, they could inflame tension over race and law enforcement that have dogged New York City Mayor Bill de Blasio, sparked protests around the country and drawn in President Barack Obama and his attorney general, Eric Holder.