The person of interest taken into custody in connection with the killing of UnitedHealthcare CEO Brian Thompson had a history of volunteering in healthcare, according to social media.
Luigi Mangione, 26, spent five months as an activities volunteer with Lorien Health Systems in Maryland in 2014, according to his LinkedIn profile.
At the time, Mangione was a student at an all-boys preparatory school in Baltimore. He would later go on to be named high school valedictorian two years later.
Mangione, 26, of Towson, Maryland, was taken into custody Monday while eating at a McDonald's in Altoona, Pennsylvania, after a customer recognized him and called 911, police said, according to CNN.
He has not been charged in connection with the shooting, but was brought in on gun charges.
Upon being taken in for questioning, Mangione was allegedly found with a manifesto on his person, criticizing healthcare companies for putting profits over patients, police said.
"We don't think there's any specific threats to other people mentioned in that document, but it does seem that he has some ill will towards corporate America," NYPD Chief Joseph Kenny told reporters at a Monday press conference, confirming Mangione was in custody, according to the network.
It's law enforcement's belief he acted alone.
In the manifesto, Mangione reportedly wrote: "These parasites had it coming" and "I do apologize for any strife and trauma, but it had to be done," a law enforcement official told the outlet.
He also had a ghost gun and the same fake ID he used to check into a New York City hostel in November, said police.
Thompson, 50, was in New York City for the company's annual investors meeting Wednesday when he was ambushed by a masked shooter who fired off several rounds into his back and leg, leaving him mortally wounded.
He was pronounced dead at a hospital.
At the crime scene, investigators recovered live 9mm rounds and three discharged casings engraved with words "deny," "depose," and "defend," as reported by the New York Post. The words appear to allude to the title of Jay Feinman's book "Delay, Deny, Defend," which criticizes the practices of insurance companies.
Mangione has no prior criminal record, police said.
He graduated from the University of Pennsylvania with a Masters in Computer Science in 2020. He currently works as a Data Engineer for TrueCar, Inc., and lives in Honolulu, Hawaii, according to his LinkedIn.
