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,

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.

The company never told investors how it planned to shift its strategy following public backlash and increased government scrutiny, the new lawsuit alleges.