2013 FIB robbery

On September 28, 2013, four unknown assailants robbed the NOOSE headquarters located in the FIB building in Downtown Los Santos. Three of the four stole intelligence information from a server, while one was located in a helicopter. After the helicopter crashed into the FIB building, killing the pilot, the other three repelled down and escaped disguised as rescue.

Background
The FBI headquarters is a 748 ft (228 m) skyscraper located in downtown Los Santos. It holds the headquarters of NOOSE, a military agency.

Heist
Before the heist began, a Darnell Bros facility was set on fire, possibly the headquarters of the robbery.

The heist began at around 3:30a.m. on September 28, 2013. The assailants landed on the roof and silently broke into the empty NOOSE office. Soon after, an explosion rocked the floor. Cameras captured an assailant (known as A1) using a USB drive to grab information from a server.

FIB security responded to the alarm sounding from the explosion and were gunned down by the three. An FIB helicopter soon arrived and shot down the assailants helicopter, making it spin out and crash into floors 51-48 and killing the pilot (known as A4). A4 was never identified. The fire was put out hours after.

The three assailants then repelled off the 49th floor and made it to ground level where they killed four more FIB agents. The assailants entered an ambulance and drove off the scene.

Aftermath
A massive rescue response ensued after the helicopter crash. Agent Steve Haines gave a press conference, stating this event as a tragedy and vowed to find those responsible.