Police are questioning a man in Altoona, Pennsylvania, in the brazen murder of Brian Thompson, CEO of UnitedHealthcare in midtown Manhattan, law enforcement sources told ABC News – a possible major break in the case since the suspect was believed to be dead after the Murder on Wednesday who fled New York City was kill.

Sources said the man was on a Greyhound bus traveling through Altoona on Monday morning when he got off and walked into a McDonald’s, where a witness recognized him from images of the suspect distributed by police.

Sources said the man had a similar weapon to the one used in the assassination-style killing.

The Altoona man was stopped with fake IDs, including a New Jersey ID that matched the ID the suspected gunman used to check into an Upper West Side hostel before the shooting, sources said.

MORE: Timeline of UnitedHealthcare CEO shooting suspect before, during and after shooting

Sources said police also seized writings and a computer belonging to the man in Altoona.

Local law enforcement told the NYPD it was a suspect, sources said. The NYPD is sending detectives to Altoona, which is in central Pennsylvania, about 100 miles east of Pittsburgh.

Law enforcement is demanding Greyhound’s passenger manifest to see what name he gave them, sources said.

Law enforcement sources told ABC News that investigators on Sunday worked through hundreds of tips, which were processed into dozens of potentially promising leads, and were keeping an eye on two possible people.

Much of their work focused on the shooter’s trip to Manhattan – where he arrived on November 24 – since police knew the bus route he took, sources said. Investigators drove to Atlanta, where the bus originated, and poured over mountains of videos and images from each of the 13 stops on that route, sources said.

Meanwhile, new video from ABC News shows the killer waiting for Thompson moments before the shooting.

The video shows others walking by, and then when the masked gunman sees Thompson, he runs across the street and opens fire.

The video, which has not been seen publicly, appears to support the police account that the gunman targeted Thompson because he was loitering while others walked by.

Police have not determined a motive but said they found no evidence to show the murder had anything to do with Thompson’s personal life.

MORE: Who killed UnitedHealthcare CEO Brian Thompson? What we know about the suspect

On Wednesday morning, the masked gunman shot Thompson at close range outside New York’s Hilton Midtown, where Thompson’s company was holding an investor conference. NYPD Commissioner Jessica Tisch described the attack as “brazen” and “targeted.”

Immediately after the shooting, the suspect fled on a bicycle through Central Park to the Upper West Side. According to police, he then took a taxi to the Port Authority bus station on 178th Street and boarded a bus from there.

NYPD officials released new images this weekend of the suspect in the back of a taxi, where he could be seen peering through the open slider in the partition between the seats. Another photo appeared to show the man walking past the window of a taxi.

On Sunday, members of the New York Police Department’s dive team searched underwater in Central Park near the Bethesda Fountain.

The suspect’s backpack – with a jacket and Monopoly money inside – was found nearby in Central Park.

Police have not recovered the distinctive weapon used in the shooting.

ABC News’ Bill Hutchinson, Jon Haworth, Ivan Pereira and David Brennan contributed to this report.

UnitedHealthcare CEO’s latest shooting: Man held for questioning in Pennsylvania, sources say originally appeared on abcnews.go.com