Mangione, 26, entered a New York City courtroom wearing the vest over a green sweater and with his hand and ankles shackled shorty before 2.30pm on Friday.
Some Mangione supporters waited outside a New York courthouse since 4am on Friday to get a spot to observe inside.
Luigi Mangione, the accused killer of UnitedHealthcare’s CEO, appeared in court for the first time since his arraignment wearing a bulletproof vest.
REUTERS/Jeenah Moon] Mangione was arraigned on state murder and terror charges on December 19.
As Mangione departed Manhattan Criminal Court, officers told observers ti have ‘no outbursts’.
