A group of investors this week filed a proposed class-action lawsuit against UnitedHealth Group, alleging that the company withheld information following the murder of UnitedHealthcare CEO Brian Thompson last December.

UnitedHealth Group is facing a class action lawsuit from investors, who allege the company misled them after the December killing of top executive Brian Thompson.

Investors are accusing UnitedHealthCare's parent group of conning the public to boost profits — and, ultimately, of getting CEO Brian Thompson killed. In a proposed class action lawsuit filed earlier this week in New York,