India, July 29 -- On Monday evening, 27-year-old Shane Devon Tamura calmly walked into a Midtown Manhattan skyscraper armed with an M4-style rifle and opened fire, killing four people, including a cop, Didarul Islam, before shooting himself in the chest.

NYPD is still piecing together his background and potential motives.

Tamura, originally from Nevada, travelled across the U.S. before arriving in New York just hours before the shooting. His black BMW was traced through Colorado, Nebraska, Iowa, and New Jersey before reaching NYC around 4:30 PM Monday, just two hours before the shootout.

The 27-year-old maniac lived in a gated neighbourhood in Las Vegas with his parents. In 2021, his parents purchased the property with three bedrooms a...