(CNN) — During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed a police officer, then opened fire on other innocent strangers.

Park Ave. gunman Shane Tamura bought the assault rifle he used to kill an NYPD cop and three civilians before taking his own life inside a Midtown Manhattan office building from a friend and ...

Detectives found prescription medication for depression and epilepsy in the Las Vegas home of Midtown mass shooter Shane ...

Exclusive: The 27-year-old gunman would sometimes look ‘empty,’ or spaced-out, Tobenna Okunna told The Independent, adding, ...

Explore the shocking events surrounding the NYPS case and uncover what pushed Shane Tamura to kill 4 people in Midtown ...

CTE, or chronic traumatic encephalopathy, is a brain disease linked to repeated hits to the head, often seen in military ...