Newly released body-worn camera footage is shedding new light on Shane Tamura, the 27-year-old gunman who shot and killed four people in New York City last Monday. Jhovani Carrillo walks us through some of the things we've learned.

The man who opened fire at a Midtown Manhattan office building last month, killing four people and injuring another before fatally turning the gun on himself, had a history of run-ins with police in his hometown of Las Vegas,