Records: NYC gunman had history of run-ins with police

Newly released police reports and body camera footage are shedding light on the troubled path that led a shooter on a cross-country drive from his home in Las Vegas to the skyscraper in Manhattan where he killed four people last week before turning the gun on himself.

Records from the Las Vegas Metropolitan Police Department reveal a history of lingering symptoms from a concussion and run-ins with police in his hometown, including mental health-related calls made by his mother and two stints in a mental health facility. Shane Devon Tamura, 27, stormed into 345 Park Avenue on July 28 armed with an AR-15 style rifle, and carried out the city’s deadliest mass shooting in 25 years.

CNN's Brynn Gingras reports, and John Berman speaks with CNN chief law enforcement and intelligence analyst John Miller. #CNN #News