Terrifying scenes in Midtown Manhattan showed office workers running for their lives with their hands in the air. The surveillance image shows the suspect, identified as 27-year-old Shane Tamura, entering the skyscraper with an M-4 assault rifle at his side.

A man stalked through a Manhattan office tower firing a rifle, killing four people, including a New York City police officer, and wounding a fifth before taking his own life, officials said.