My sister Victoria was wrangling Elias, her then-2-year-old, into his costume on Halloween when the spots of blood in her underwear became worrisome. It was almost exactly two years ago, in 2022, and Elias had woken up from a nap excited about trick-or-treating. She’d gotten him into a shiny black firefighter hat, a yellow jacket with neon reflectors, kelly-green shoes, and a bright red hatchet — the color of the blood she could no longer ignore.