Friends and colleagues struggle to cope with the UnitedHealth executive’s death, while others cheer for the man accused of killing him.

A grinning Luigi Mangione appeared to yuk it up in a Manhattan courtroom Monday as he entered a plea in the murder of UnitedHealthcare CEO Brian Thompson.

In an entry in the notebook dated Aug. 15, Mangione allegedly wrote he “was glad” that he procrastinated in his preparations because it “allowed him to learn more” about UHC.

Horrified colleagues and friends say the online caricature of Brian Thompson in the wake of his murder bears no resemblance to the Iowa native they knew.

A video shared online of Alpha Studio venture capitalist Brian Thompson speaking at a 2012 entrepreneurs’ workshop is miscaptioned as showing UnitedHealthcare CEO Brian Thompson talking about “working with” former House speaker Nancy Pelosi.

A few hours after a gunman killed Brian Thompson, the CEO of UnitedHealthcare, the company said on X that its “hearts go out to Brian’s family and all who were close to him.” Within two days, over 71,

"The target is insurance because 'it checks every box,'" read a passage from a notebook, which was dated Aug. 15, that authorities found with Luigi Mangione, according to the court papers.

Luigi Mangione was charged in a four-count federal indictment that could land him the death penalty if convicted of murder.

Luigi Mangione, the suspect of fatally gunning down UnitedHealth Group executive Brian Thompson, pleaded not guilty on Dec 23. Mangione, 26, was escorted into a 13th-floor courtroom with a court officer in the New York State Criminal Courthouse in lower Manhattan.

The alleged killer has been described as a "sex symbol" and "radiant," with many NSFW posts circulating widely on social media.