Luigi Mangione’s legal defense fund surpassed $1.5 million on his 28th birthday, marking another fundraising milestone in the closely watched prosecution over the killing of a UnitedHealthcare executive. The GiveSendGo campaign tied to Mangione’s defense showed $1,516,476.69 raised as of May 7 against a stated goal of $1.5 million. The fundraiser was created by “The December 4th Legal Committee,” with funds listed as payable to Tom Dickey Law Of…