NYPD Commissioner Jessica Tisch laid out a timeline of how Shane Tamura carried out his heinous attack on a Midtown skyscraper early Monday evening.

Here’s a full breakdown of the harrowing events:

Reports of the shooting at 345 Park Avenue started coming in at around 6:28 p.m.

The shooter, Tamura, 27, was seen on surveillance footage getting out of a double parked black BMW between 51st and 52nd Street, with an M4 rifle.

He then walks towards the skyscraper, enters the lobby and turns right, where he shot police officer Didarul Islam, 36, dead.

Tamura then fired at a woman hiding behind a pillar in the lobby, continuing to shoot as he approached the elevator area — where he also aimed at a security guard huddled at his desk.

One more man reported being shot and injured in the lobby. He was in critical but stable condition.

The shooter permitted a woman to exit the elevators without harm, before proceeding to the 33rd floor, where the offices of building owner Rudin Properties are situated, “and started moving through the floor, shooting as he moved.”

Here is the latest on the NYC mass shooting:

One woman was found shot and killed on that floor.

“He then proceeds down a hallway and shoots himself in the chest,” ending his rampage.

It’s unclear how long the mayhem lasted. Tisch posted on X at 7:52 p.m.: “the scene has been contained and the lone shooter has been neutralized.”