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.

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,

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