A notebook found at Luigi Mangione's home incorporates an outline of a CEO's assassination that matches details of his alleged murder of the UnitedHealthcare CEO last week in New York, NBC News reported Wednesday.
“What are you doing?” reads one section of the notebook.
“They bash the CEO at the annual conference of parasitic bean counters,” the notebook says. “It is targeted, precise and does not endanger innocent people.”
The notebook was discovered when the Ivy League graduate was arrested Monday in Altoona, Pennsylvania, by police who found a gun, a silencer and ammunition in a backpack he had with him at a neighborhood McDonald's.
That gun matched three bullet casings found outside the Hilton hotel in midtown Manhattan where UnitedHealthcare CEO Brian Thompson was fatally shot on Dec. 4, New York police said Wednesday.
New York Police Commissioner Jessica Tisch also revealed that fingerprints from Mangione's match left marks on a water bottle and a children's snack bar near the shooting site. Police said last week that the then-unidentified gunman who killed Thompson had bought water and protein bars before the shooting.
Thompson, a father of two, was scheduled to talk at an investor day hosted by Dec. 4 UnitedHealth Grouphis company's parent company, which took place on the Hilton.
Surveillance video of Thompson's killing shows a masked man with a gun that appears to be attached to a silencer firing on the CEO from behind just outside the Hilton while one other person stands nearby.
Hours after Thompson's killing, Tisch told reporters: “I want to be clear: At this point, everything indicates that this was a premeditated, pre-planned, targeted attack.”
It was previously reported that when Mangione was arrested in Altoona, he also had a handwritten note with him that read, partially, “These parasites just had it.”
The note, which said he “doesn't work with anyone,” also said, “I apologize for any disruption or trauma, but it had to be done.”
The note criticized UnitedHealthcare, the U.S. healthcare industry and firms.
Mangione, who holds two degrees from the University of Pennsylvania, has reportedly suffered from significant back pain for years.
UnitedHealthcare, the biggest private payer of medical health insurance services within the United States, has been criticized for denying customers' claims.
Mangione is being held without bail in Pennsylvania on federal firearms and forgery charges related to his arrest. The forgery charge pertains to his alleged possession of several false identification documents, including one which was allegedly used to ascertain right into a hostel on Manhattan's Upper West Side nearly two weeks before Thompson's murder.
He is accused of murder and gun crimes in Manhattan.
At a hearing in Blair County Court on Tuesday, Mangione refused to waive extradition to New York to face charges in Thompson's killing.
The Manhattan district attorney's office and New York Gov. Kathy Hochul said they’d file the needed paperwork for a judge in Pennsylvania to make a decision whether to order Mangione's extradition.
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