AILSA CHANG, HOST: The suspected killer of United Healthcare's CEO remains at large one day after Brian Thompson was shot outside a hotel in New York City. Authorities have said the

shooting was a targeted attack against Thompson, who led the largest health insurer in the U.S. NPR's Maria Aspan joins us now from New York with more details. Hi, Maria. MARIA ASPAN,

BYLINE: Hi, Ailsa. CHANG: OK, so this manhunt - I mean, it's been going on for more than a day at this point. What is the latest? ASPAN: So at this point, we know a little bit more

about what the alleged gunman looks like and what his potential motivations might have been. The NYPD released a couple of photos that show more of the suspect's face. In those two,

also said that several shell casings used in the attack had some words written on them, words including deny and defend. And those words have been seen as a possible reference to how big

insurance companies, including United Healthcare, deny claims, and they may point to a motivation for the shooter. And, again, police have said this was a premeditated, targeted attack on

Thompson, who did run the largest health insurer in the country. CHANG: Well, how much do we know about the gunman's motives at this point? ASPAN: Not much past rampant speculation. And

we should say that United Healthcare has said it's working with the police, but it hasn't really commented much further. Some of the photos and surveillance footage of the

shooting has led to some speculation that the killer was professional. He handled his gun comfortably, even when it appeared to jam, and he seemed calm and cold-blooded in the way that he

shot Thompson from behind several times. But I did talk to some security experts that reviewed the video and who are skeptical that this was a professional hit. For example, the gunman was

also caught on camera at Starbucks before going to the hotel where he shot Thompson. And here's Philip Klein, who runs a security company in Texas. PHILIP KLEIN: Everybody says, oh,

he's a professional hitter. I don't think so. Who goes and gets coffee in the morning before you're fixing to have a major - I mean, nobody does that. ASPAN: Klein's

company provides bodyguard services to corporate executives and worked with Thompson in the past. And Klein told me that of all the businesses his bodyguards work with, health care

executives get some of the most threats. CHANG: How interesting. Well, going back to motive, I mean, do we have any evidence beyond those words inscribed on the bullets that the gunman was

motivated by anger against Thompson's company? ASPAN: It has been reported that Thompson has received threats in the past, although, again, there's a lot of speculation. We've

also seen a huge outpouring of anger and frustration about United Healthcare specifically in the past day. Many on social media are making jokes or going so far as to celebrate this

killing. However awful this rhetoric, it shows some real frustration with health care in the United States. It's the most expensive in the developed world, and it has some of the worst

outcomes. And United Healthcare and its parent company, United Health, are the biggest player in this system. They make a lot of money off of it. United Health made more than $371 billion in

revenue last year. So whatever we end up finding out about the shooter's motives, the reaction to his actions are highlighting many huge problems facing both health care companies and

all of us. CHANG: That is NPR's Maria Aspan in New York. Thank you, Maria. ASPAN: Thank you. Transcript provided by NPR, Copyright NPR. _NPR transcripts are created on a rush deadline

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