Brian Thompson’s Alleged Killer Took Bus From Atlanta To New York

The gunman who killed UnitedHealthcare CEO Brian Thompson arrived in New York City on a bus from Atlanta … TMZ has confirmed.

Law enforcement sources tell us the suspected shooter arrived in the Big Apple 10 days before the shooting on November 24 … taking a Greyhound bus to the Port Authority station in Manhattan.

From there, we’re told the suspect checked into a hostel.

Thompson was shot dead Wednesday morning outside a hotel in what cops are calling a targeted, planned attack. Cops say the gunmen then fled the scene on a Citi Bike.

Our sources say law enforcement also interviewed a woman who worked at the hostel who told investigators she flirted with the suspect and got him to lower his mask … which is how cops ended up with photos of the guy’s face.

The motive is still unclear here … but it’s worth noting the bullet shells were inscribed with three words … “deny,” “depose” and “defend.”