Luigi Mangione, accused in the killing of UnitedHealthcare CEO Brian Thompson, may not face a state murder conviction after pleading guilty to federal stalking charges. His defense team has filed a motion to dismiss the state murder and firearms charges, citing double jeopardy, a legal principle that prevents individuals from being prosecuted twice for the same crime.

Attorneys for Mangione argue that although the federal and state charges differ, they stem from the same underlying event: the killing of Thompson in 2024. This strategy leverages a New York State law that prohibits subsequent prosecutions arising from the same transaction or occurrence as a previous case. Experts believe this could lead to the dismissal of the state murder charges.

"It's very creative lawyering by his lawyers to do this," said Mark Bederow, a former Manhattan DA prosecutor. "The loser here is the Manhattan DA."

Prosecutors from the Manhattan District Attorney's office have stated they are prepared to litigate the defense's motions. "The Manhattan DA’s Office remains committed to seeking justice for Mr. Thompson and his family," a spokesperson said.

The federal case saw prosecutors lose their bid for the death penalty and have murder and firearms charges dismissed, leaving only stalking charges. Some legal observers suggest this outcome may have inadvertently undermined the state's case. "The feds 'botched' their case and in turn 'sabotaged and torpedoed' Bragg’s case," said former prosecutor Neama Rahmani.

Mangione's legal team has claimed he has been a "pawn" in a sensationalized case by both prosecutorial offices. They assert that the manner in which the cases were pursued violates his Fifth Amendment rights against double jeopardy.

The state murder trial, initially set for September 8, is now unlikely to proceed on schedule, with the double jeopardy arguments potentially heading to New York's highest court. If the state case is dismissed, Mangione would serve his sentence in a federal facility, which is generally considered less stringent than state prisons.

Mangione is scheduled to be sentenced in the federal case on December 18, where he faces a potential life sentence. The state case carries a sentence of 25 years to life.