While Luigi Mangione today stands trial for the killing of UnitedHealthcare CEO Brian Thompson, the U.S. Justice Department is launching a civil fraud investigation into the conglomerate’s Medicare billing practices.

The Justice Department has launched an investigation into UnitedHealth Group’s Medicare billing practices in recent months, people familiar with the matter said.The new civil fraud investigation is examining the company’s practices for recording diagnoses that trigger extra payments to its Medicare Advantage plans,

UnitedHealth Group called The Wall Street Journal's report "misinformation" and said it was unaware of reported investigaiton.