Extradition could take 30 to 45 days - police
Once charging documents are filed in New York, Pennsylvania will file a "fugitive justice complaint" and he will be brought before a state judge, police say.That judge will then present Luigi Mangione with the option of waving his extradition or to contest it.
If he waives it, he will immediately be made available to New York authorities.
If he contests it, the process could take between 30 and 45 days. It is a common procedure.
Charges will be filed against Mangione 'very soon' - Governor Shapiro
Governor Shapiro says "presumably New York will file charges very soon" against Luigi Mangione, adding that "justice will be delivered in this case."He adds that this case has "hinged on attention", which he says was helpful in allowing to catch the gunman.
A reminder that Mangione has so far only been charged on counts including forgery and carrying a firearm without a license.
Mangione in Pennsylvania for several days
Police are now speaking about the items found in Mangione's backpack, including written documents and electronic devices that are in the process of being searched to get a sense of his activities and to retrace his steps.
They add that he has been in Pennsylvania "for several days" and have identified businesses he visited.
Police add they have a "good idea" of his journey since leaving New York City, noting a "variety of locations across the state" - but add that more will be determined as the investigation progresses.

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An employee called police in Pennsylvania who found the man with a firearm consistent with the murder weapon.
