https://www.bbc.com/news/articles/cp9nxee2r0do
Police announced on Monday they had arrested Luigi Mangione, 26, on firearms charges after he was recognised by an employee at a McDonald's in Altoona, Pennsylvania.
The Baltimore, Maryland, native had a three-page handwritten document that mentioned grievances with the US healthcare system and indicated the suspect's "motivation and mindset", officials said.
Mr Mangione was born and raised in Maryland and has ties to San Francisco, California, according to New York Chief of Detectives Joseph Kenny.
He has no prior arrests in New York and his last previous address was in Honolulu, Hawaii, police said.
He attended a private, all-boys high school in Baltimore, called the Gilman School, according to school officials. Mr Mangione was named as the valedictorian, typically the student with the highest academic achievements in a class.
A former classmate, Freddie Leatherbury, told the Associated Press news agency that Mr Mangione came from a wealthy family, even by that private school's standards.