Luigi Mangione, who is accused of gunning down a top insurance company executive on a New York City street, has inspired others to embrace violence, including the gunman behind last month’s deadly attack on the NFL headquarters in Manhattan, federal prosecutors contend in a new court filing. Mangione, the prosecutors argued in Wednesday’s filing, poses a threat to the public because he is actively seeking to influence others to follow in his footsteps. “Simply put, the defendan

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