Brian Thompson's accused assassin Luigi Mangione was led on a public perp walk when he landed in Manhattan, a move that legal experts noted was unusual.

UnitedHealthcare CEO Brian Thompson died Wednesday after being shot in New York City, according to multiple media reports. The New York Post, New York Times, CNN and Bloomberg are among the outlets to report the news.

NYPD Commissioner Jessica Tisch told CNN the department had "reason to believe" the suspect has left the city.

We have taken a significant step toward achieving justice for Brian Thompson and his family,' said the NYPD Commissioner.

After being arrested in Pennsylvania, Luigi Mangione is now in federal jail in New York City where he is facing charges related to the killing of United Healthcare's CEO. Lilia Luciano has the latest from Manhattan.

Luigi Mangione, the man accused of gunning down UnitedHealthcare CEO Brian Thompson, is expected to waive extradition and could be sent to New York as soon as Thursday.

Luigi Mangione, who is accused of killing UnitedHealthcare CEO Brian Thompson, waived his extradition in Pennsylvania court and was transported to New York on Thursday. Mangione faces state charges, including first-degree murder in the furtherance of terrorism,