Alleged gunman faces nine charges including second-degree murder in New York state case

Luigi Mangione is due to appear in Manhattan state court on Monday for the first day of a potentially weeklong proceeding to weigh the legality of evidence gathered during his arrest after the killing of a prominent healthcare executive.

Mangione was apprehended last December in the murder of senior United HealthCare figure Brian Thompson last December. In addition to state-level charges, he faces a Manhattan federal court case.

Thompson’s brutal slaying on the streets of New York city triggered an intense manhunt for the killer, but also sparked an outpouring of anger at the practices of the US for-profit healthcare industry. Since his arrest Mangione has attracted some enthusiastic supporters, both online and at his court appearances.