Because this guy chose to rot in a cell, forgotten. He thew the celebrity he had away. The longer it was unsolved the more thought and talk was engendered. Now all that happens is the boot comes down.
The Mickey D employee who turned him in. I hope he comes down with a medical condition that is denied. I hope he gets prescribed prescriptions meds that cost hundreds of dollars a pill in copays. I hope all the plagues of Egypt inhabit his rectum.

Give the rat the national Dunning–Kruger award.
There Manifesto should have just been posted online. It could have been done here.
Supporters of Mangione have allegedly set up GoFundMe accounts to raise money for Mangione's legal fees, although the site has removed any such pages.
Reddit also appears to be tamping down on support for the alleged assassin. The site banned an r/LuigiMangione community hours after it was created — but not before the page racked up hundreds of subscribers.
Netizens meanwhile have attacked the tipster who phoned police as a "snitch" and a "rat" with some users publicly threatening the unnamed worker.