It’s the new murder ink. Obsessed Luigi Mangione admirers have started getting tattoos as a permanent tribute to the man accused of executing UnitedHealthcare CEO Brian Thompson. A number of images have started appearing online showing off inkings honoring Mangione, 26, not even two weeks after the Ivy League grad allegedly shot dead the 50-year-old dad of two in Midtown Manhattan. One even has an image of the hooded gunman inside a love heart in the phrase: “I [heart] my boyfriend.” Another image shared on Instagram showed an etching of Mangione’s face alongside “delay,” “deny” and “defend” — the main...