NYC Mayor Eric Adams shared new details about the deadly Midtown Manhattan office shooting, including a possible NFL connection and the gunman's cross-country journey.

NYPD detectives searched the shooter's studio apartment in Las Vegas where they found what law enforcement sources described to ABC News as a suicide note that said, "When I look into you and dad's eyes, all I see is disappointment. I love you, Mama. I'm sorry."

The shooter behind a deadly rampage inside an office building in Midtown Manhattan on Monday evening was apparently targeting NFL offices there, New York City Mayor Eric Adams said Tuesday morning.Law enforcement sources say investigators recovered a three-page rambling note from gunman Shane Tamura's wallet in which he referenced the brain disease CTE.

NEW YORK -- A 27-year-old man wearing body armor and carrying an M4 assault rifle shot and killed four people, including off-duty New York Police Department Officer Didarul Islam, who was working security in a Midtown Manhattan office building, officials said during a press conference Monday evening.

Five people, including a police officer and the suspect died in a shooting incident in Midtown Manhattan on Monday evening, after the gunman opened fire near a corporate office building on Park Avenue.