A doorbell camera caught him walking up to the house with a bouquet of roses. Twelve minutes later, another camera caught him riding away in a mask and gloves. Inside, 43-year-old Christina Parcell had been stabbed 35 times, her body found surrounded by scattered rose petals. This week, we're pulling apart one of the most tangled cases we've ever covered.

Christina left behind a sister who never doubted her, a fiancé who found her body and immediately asked for gloves before touching anything, and an ex-partner whose obsession with her stretched across a continent. We dig into the custody battle, the harassment campaign, and the pile of red flags nobody in her life could agree on. Part two, and the reveal of who actually did this, drops next week.

"That's Genevieve. And that's Kaitlyn."

Sisters-in-law, be ...