New images have been released of the suspect wanted over the targeted murder of a healthcare boss in New York City.

Brian Thompson, the chief executive of UnitedHealthcare, was gunned down outside a Manhattan hotel yesterday morning before the start of a conference.

Police say the gunman was wearing a mask and footage shows him walking slowly behind Mr Thompson before shooting him several times in the back.

Mr Thompson, 50, who headed one of the largest US health insurance companies, was ambushed at 6.45am local time on Wednesday as he walked to the company’s annual investor conference at a Hilton in Midtown.

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Healthcare boss gunned down

The attacker fired multiple times at Mr Thompson and continued despite the gun briefly jamming, according to police.

He then escaped the scene on an e-bike towards Central Park.

In new pictures released by police, the suspect can be seen smiling before the attack.

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Suspect wanted over Brian Thompson murder
Image:
Pic: NYPD

The masked gunman used ammunition emblazoned with the words “deny,” “defend” and “depose,” a law enforcement official said.

The words on the ammunition may have been a reference to strategies insurance companies use to try to avoid paying claims.

New York Mayor Eric Adams, who is a retired NYPD captain, told MSNBC’s Morning Joe programme that what had “shocked” them was the fact the shooter used a silencer, something he had never encountered “in all of my years in law enforcement”.

A former FBI special agent, Terry Rankhorn, told Kay Burley on Sky News Breakfast the footage of the shooting was “chilling”.

“What you can determine from his behaviour is this person is a practised, seasoned, trained professional killer,” Mr Rankhorn said.

“He doesn’t run up like an inexperienced, emotional but amateur killer… this person calmly walks out,” he added.