Mr Mangione was taken into custody at a McDonald’s after a customer informed an employee, who tipped off authorities.

At the time, he was in possession of a black ghost gun – the kind that could be assembled at home using a 3D printer – a silencer and a loaded magazine with six rounds of 9mm ammunition.

Police said he was carrying several IDs, including one with his real identity and another that was fake.

These IDs included a US passport and a fraudulent New Jersey ID that was used to check into the New York City hostel, where the suspect was seen before the shooting.

When he was told he would be arrested if he had lied about his name, he admitted he was Luigi Mangione.

Asked why he lied, he told officers “I clearly shouldn’t have”, according to court papers.

He “became quiet and started to shake” when asked if he had recently been to New York, according to the criminal complaint filed in Pennsylvania.

Police say he was also found with three pages of handwritten documents in which he seemed to express “ill will towards corporate America”.

The document also said “these parasites had it coming” and “I do apologise for any strife and trauma, but it had to be done”, a senior law enforcement official told the New York Times.

Police said although his arrest was “peaceful”, he has since stopped being cooperative.