Luigi Mangione prosecutors fire back at suspected assassin’s complaints over arrest: ‘Reasonable suspicion’

Pennsylvania prosecutors connected Monday said authorities lawfully detained and collected grounds from Luigi Mangione, the fishy accused of sidesplitting UnitedHealthcare CEO Brian Thompson, during his December 2024 apprehension successful Altoona, wherever helium allegedly fled aft the transgression successful New York.

Mangione, 26, is charged with first-degree execution successful furtherance of an enactment of terrorism, stalking and a slew of different authorities and national charges successful some New York and Pennsylvania, for allegedly gunning down Thompson, a 50-year-old joined begetter of two, connected a sidewalk successful Manhattan connected Dec. 4, 2024.

"The Commonwealth avers that constabulary astatine each times acted wrong the authorization bestowed by law," the tribunal papers filed Monday states.

The papers further states that Altoona instrumentality enforcement officers who responded, successful uniform, to a 911 telephone from a section McDonald's manager saying she saw idiosyncratic successful her determination who "looks similar the CEO shooter from New York," followed protocol erstwhile they approached Mangione.

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Luigi Mangione appears successful Manhattan Criminal Court for a presumption proceeding connected Feb. 21, 2025. He is accused of sidesplitting UnitedHealthcare CEO Brian Thompson extracurricular a New York City edifice past year. (Curtis Means/Pool)

"The officers had valid tenable suspicion to enactment an investigatory detention to place who Defendant-Mangione was and whether helium was a homicide suspect; however, defendant-Mangione voluntary [sic] speaks to officers without constabulary compulsion and willingly provides them with his forged identification," prosecutors wrote. "In fact, astatine nary clip does Defendant-Mangione inquire to leave, effort to permission oregon effort to disengage from the detention."

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Prosecutors further stated that erstwhile Mangione "produced a fraudulent and forged identification, the brushwood instantly ascended to probable origin arrest."

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The filing comes aft Mangione's Pennsylvania defence attorney, Thomas Dickey, argued successful a March tribunal papers that Mangione had been improperly detained and arrested astatine the McDonald's, truthful definite grounds collected during that apprehension should not beryllium submitted arsenic grounds against his client, including what helium described arsenic a warrantless hunt of the suspect's backpack, statements made to constabulary during his apprehension and DNA evidence. 

Fox News Digital reached retired to Dickey.

ACCUSED CEO ASSASSIN LUIGI MANGIONE INDICTED ON FEDERAL CHARGES

UnitedHealthcare CEO slaying fishy Luigi Mangione is pictured astatine a McDonald's successful Altoona, Pennsylvania, connected Dec. 9, 2024. (Pennsylvania State Police)

Mangione allegedly changeable Thompson extracurricular the Manhattan edifice wherever UnitedHealthcare's yearly shareholder league was being held, successful an enactment prosecutors judge was meant to nonstop a connection to the healthcare security manufacture based connected a manifesto recovered connected the fishy erstwhile helium was arrested days aft Thompson's murder.

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In his writings, Mangione seemingly expressed his grievances with the healthcare manufacture – specifically naming UnitedHealthcare and the shareholder league wherever Thompson was headed successful New York astatine the clip of the assassination.

LUIGI MANGIONE'S DEFENSE FILES MOTION TO PRECLUDE DEATH PENALTY IN HIS FEDERAL CASE

Luigi Mangione pictured successful a Pennsylvania mugshot aft his apprehension successful transportation with the execution of UnitedHealthcare CEO Brian Thompson. (Obtained by Fox News Digital)

He allegedly fled New York via autobus and made it arsenic acold arsenic Altoona, successful betwixt Pittsburgh and Harrisburg, earlier helium stopped astatine McDonald's and ordered a hashbrown conscionable earlier his arrest.

Mangione is accused of "meticulously" readying the execution with the motive of igniting a "public treatment astir the healthcare industry," according to the U.S. Department of Justice.

SUSPECTED UNITEDHEALTHCARE ASSASSIN LUIGI MANGIONE'S PLAN TO 'WACK' CEO REVEALED IN JOURNAL ENTRIES: AFFIDAVIT

UnitedHealthcare CEO Brian Thompson was killed connected Dec. 4, 2024. (AP Photo/UnitedHealth Group)

New York prosecutors accidental Mangione plotted to question to New York, find Thompson – a Minnesota nonmigratory successful municipality for UnitedHealthcare's yearly shareholder league – and termination him. Mangione allegedly changeable Thompson from down with a 3D-printed shade weapon and suppressor. 

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The NYPD released a inactive representation from surveillance video, showing him pulling his look disguise down and smiling portion flirting with a clerk astatine the check-in of the Manhattan hostel wherever constabulary accidental helium stayed for the murder. It went viral and instantly attracted a question of enactment online for the accused killer.

Luigi Mangione shouts portion officers restrain him arsenic helium arrives for his extradition proceeding astatine Blair County Courthouse successful Hollidaysburg, Pennsylvania, connected Dec. 10, 2024. Mangione is the premier fishy successful the shooting decease of United Healthcare CEO Brian Thompson past week. (David Dee Delgado for Fox News Digital)

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Mangione is primitively from Maryland and precocious lived successful California and Hawaii. He graduated arsenic valedictorian from the Gilman School, a private, all-boys precocious schoolhouse successful Baltimore, successful 2016.

Mangione went connected to person his bachelor's and master's degrees successful machine subject from the Ivy League University of Pennsylvania successful 2020. 

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Fox News Digital's Michael Ruiz contributed to this report.