In our other top story tonight, the suspect in the killing of United Health Care CEO has been charged with murder in New York.

That's after he was found and arrested Monday in Pennsylvania.

At his first court hearing this afternoon, the alleged gunman would not go quietly.

26-year-old Luigi Nicholas Mangione arrived for his initial court appearance in Pennsylvania

today.

Completely out of dust and his insult the intelligence of the people.

The accused killer shouting and struggling with officers outside.

Inside, he remained defiant, contesting extradition to New York where he faces his most serious charges.

Overnight, the first glimpses of a more cooperative Mangione,

as he was seen hauled away in handcuffs and put behind bars after a six-day manhunt that led police more than 200 miles outside New York City.

He didn't even think twice about it. We knew that was our guy, but he was very,

he was very cooperative with us.

Pennsylvania authorities have charged him with possession of an unlicensed firearm,

forgery, and providing false identification. By late Monday evening, prosecutors in Manhattan

added a charge of second-degree murder for the brazen, targeted killing of United

Healthcare CEO Brian Thompson on a New York Street last week. Mangione was born and raised

in a wealthy Maryland family. All set. Attending an elite all-boys prep school in Baltimore, graduating as valedictorian in 2016.

He went to college at the University of Pennsylvania in the Ivy League, earning a bachelor and

master's in computer science. He also had a last known address in Honolulu. During that time in Hawaii, someone

who knew Mangione said he suffered from severe back pain due to a childhood injury. At one point,

he left the island to get surgery on the mainland. A photo atop an X account believed to be

associated with Mangione shows an X-ray image of screws in a spine.

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