Key things to know about the fatal attack on the UnitedHealthcare CEO in NYC

abcnews.go.com:

The chief executive of UnitedHealthcare, one of the nation’s largest insurers, was killed in midtown Manhattan in what police described as a targeted attack by a shooter outside a hotel where the company was holding a conference

The chief executive of UnitedHealthcare, one of the nation's largest insurers, was killed Wednesday in midtown Manhattan in what police described as a targeted attack by a shooter outside a hotel where the company was holding a conference.

The shooter fled on foot into an alleyway and was last seen on an e-bike heading into Central Park. New York City police said the attack on Brian Thompson was planned, but the motive was unclear.

Here's what to know:

Police said Thompson was heading to the company's annual investor conference at the New York Hilton Midtown around 6:45 a.m. when a person walked up behind him and shot him multiple times.

Thompson was alone at the time and did not have a security detail, police said.

Officers found Thompson on the ground outside the hotel with gunshot wounds to his back and right calf, according to Joseph Kenny, the police department’s chief of detectives. He was pronounced dead at a nearby hospital at 7:12 a.m.

Kenny said the shooter appeared to be a man who was wearing a black face mask, black and white sneakers and a “very distinctive” gray backpack.

He arrived outside the hotel about five minutes before Thompson got there, waiting near the building and ignoring others before he approached Thompson from behind.

After the assailant began to fire at Thompson, the gun malfunctioned, but he was able to quickly fix the issue and continue firing, Kenny said.

“From watching the video, it does seem that he’s proficient in the use of firearms as he was able to clear