New York City police detectives searched the Las Vegas studio apartment of the suspected gunman in Monday's mass shooting at a Midtown Manhattan office tower and found what law enforcement sources described to ABC News as a suicide note he left for his parents.

Investigators are combing through evidence in the wake of New York City’s deadliest mass shooting since 2000, trying to figure out more about the gunman who unleashed an assault-style rifle in Midtown,

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the heart of Manhattan during rush hour.

Socialist mayoral frontrunner Zohran Mamdani is planning to axe an elite NYPD task force that charged into a Park Avenue building during Monday’s deadly mass shooting if he takes over City Hall — despite expressing how “grateful” he was for the first responders after the attack.

Democratic socialist Zohran Mamdani doubled-down Wednesday on axing the elite NYPD unit that responded to the Midtown mass shooting – but backed off his past unpopular “defund the police” stance. The mayoral frontrunner,

The New York City office building that was the site of a mass shooting Monday had significant security measures in place.

Wearing body armor and wielding an assault-style rifle, the alleged gunman, identified by police as 27-year-old Shane Tamura, burst through the lobby doors of a 44-story office tower in the heart of Midtown Manhattan on Monday, shooting victims at random, according to authorities.