Luigi Mangione was arrested for second-degree murder in the fatal shooting of UnitedHealthcare CEO Brian Thompson after spending nearly one week on the run.
Mangione, 26, was taken into custody on Monday in Altoona, Pennsylvania, in connection with the targeted shooting outside a Midtown Manhattan hotel on Dec. 4,.
Here is a timeline of the suspect's whereabouts before, during and after the shooting:
Mangione's mother filed a missing persons report in San Francisco in November, seeking information about her son, according to two law enforcement sources.
The killer entered New York City by bus on Nov. 24, when a surveillance camera at Port Authority Bus Terminal caught his arrival at 9 p.m., law enforcement sources told ABC News.
The inbound bus originated in Atlanta but it was not immediately clear where the suspect boarded.
He likely checked into a hostel on New York City's Upper West Side that day and later checked out, sources said.
The suspect likely checked back into the HI New York City Hostel on the Upper West Side on Nov. 30, sources said.
At 5 a.m., nearly two hours before the shooting, the suspect was seen in surveillance footage outside the hostel on the Upper West Side, holding what appears to be an e-bike battery.
New cleared CCTV video shows a man who appears to be the suspect walking west on 55th Street at 6:19 a.m. The video shows him stoop down as he appears to momentarily drop an object on the garbage before continuing to walk.
Sometime before the shooting, the suspect is spotted at a Starbucks. The exact time is not clear.
The suspect appeared to walk past a parking lot on West 54th Street at 6:29 a.m. -- across the street some 50 meters from the site of the shooting.
At 6:44 a.m., the masked gunman fatally shot Brian Thompson in front of the north entrance to the New York Hilton Midtown.
"The shooter then walks toward the victim and continues to shoot," NYPD Chief of Detectives Joseph Kenny said. "It appears that the gun malfunctions, as he clears the jam and begins to fire again."
The shooter fled on foot into an alley, where a phone believed to be linked to the suspect was later recovered, police sources said.
The suspect then fled north on a bike and rode into Central Park, police said.
After making his getaway on a bike, the suspect exited Central Park at 77th Street and Central Park West.
At 86th Street and Columbus Avenue, the suspect ditched the bike and took a taxi to the Port Authority bus facility at 178th Street, by the George Washington Bridge.
At first, investigators believed Mangione then boarded a bus at the Port Authority terminal, where investigators said he was spotted on security cameras being dropped off by the taxi. But there was no imagery of Mangione actually getting onto a bus, sources said.
Police sources told ABC News there's video evidence that shows Mangione left the George Washington Bridge bus station, went south to Penn Station and left New York City by train to Philadelphia.
Mangione then spent several days traversing the state from Philadelphia to Pittsburgh, according to Pennsylvania authorities.
On Dec. 9, the suspect in the shooting -- 26-year-old Luigi Mangione -- was identified and taken into custody in Altoona, Pennsylvania, authorities said.
He was charged with five crimes in Pennsylvania, including carrying a gun without a license, forgery, falsely identifying himself to authorities and possessing "instruments of crime," according to a criminal complaint.
Prior to his arrest, Mangione was on a Greyhound bus traveling through Altoona, sources said, when he got off and walked into a McDonald's where a witness recognized him from the images of the suspect circulated by police.
Mangione faces charges in New York including second-degree murder. Mangione remains in the custody of the Pennsylvania Department of Corrections pending his extradition to New York.