A timeline of the murder of UnitedHealthcare CEO Brian Thompson and the search for his killer

The search for the killer of UnitedHealthcare CEO Brian Thompson's has stretched beyond New York City and continues. Here's what we know so far.

The search for UnitedHealthcare CEO Brian Thompson's killer since Thompson was ambushed Wednesday outside a Midtown Manhattan hotel has stretched beyond New York City. While still looking to identify the suspect, the FBI has offered a US$50,000 reward for information leading to his arrest and conviction. That’s on top of a US$10,000 reward offered by the NYPD.

The gunman used a fake ID and paid cash during the ten days he was in the city, NYPD Chief of Detectives Joseph Kenny told reporters Friday. He also kept his face covered except while checking in at a hostel. He was captured on some of the thousands of surveillance cameras blanketing Manhattan, allowing police to build a timeline of his movements.

Here's what we know so far about what the NYPD describes as a planned attack.

10:11 p.m. — The suspected shooter arrives in New York City on a Greyhound bus at the Port Authority terminal. The bus originated in Atlanta and made six or seven stops on the way to New York. Police could not immediately determine where he got on the bus.

The man then takes a taxi to the area of the New York Hilton Midtown and is there for about a half hour.

About 11 p.m. — The man takes a taxi to the HI New York City Hostel at 891 Amsterdam Ave., where he stays until the morning of the shooting. He presents an ID that police believe to be fake. Two roommates in a shared room that had bunkbeds never saw his face, police said, because he kept his mask on.

When speaking with an employee in the hostel lobby, he briefly pulled down his facemask and smiled — a moment captured on surveillance images that have been widely circulated by police.