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Hi there, from CNN. I'm Emily Williams with the five things you need to know for Friday, December 6th. The manhunt continues for the gunmen who killed United Healthcare CEO Brian Thompson on Wednesday.

A senior law enforcement official told CNN that detectives are testing possible DNA evidence.

The swab samples were taken from a water bottle and a cell phone found at the scene.

On social media, the executive's killing has unleashed a public display of rage and frustration with the health insurance industry.

People have been posting stories about their denied medical claims.

A Facebook post from United Health Group expressing sadness over Thompson's killing received

at least 62,000 reactions.

The majority of those were laughing emojis.

Elizabeth Rosenthal, senior contributing editor at KFF Health News, says there's real pent-up

anger in America against these companies and their executives.

We don't know the actual motive of this shooter, but we do know the motive of the 57,000 people who responded that way on social media because the depth of the frustration

and anger at this industry I think rivals no other.

You can hear more from Rosenthal on Sunday's episode of One Thing.

Syrian rebels are advancing toward the major city of Holmes, where residents are fleeing

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