When I look into you and dad’s eyes, all I see is disappointment,” Tamura wrote to his mother in the note. “I love you, Momma. I’m sorry.”

The gunman in the Manhattan office shooting has been tentatively identified as a 27-year-old Shane Tamura from Las Vegas, as per reports. He is believed to have died from a self-inflicted gunshot wound.

Shane Devon Tamura was the 27-year-old man living in Las Vegas who fatally shot at least four people in a mass shooting at 345 Park Avenue in New York City on July 28. Here's what to know about the N.