On a Thursday night in late September 2023, at close to 11:30, Mandy Teefey, the CEO of mental-health start-up Wondermind, sent a startling series of texts to a group of her employees. Teefey, then 47, had co-founded the company almost two years before with her famous daughter, the actress and pop star Selena Gomez, and a young entrepreneur named Daniella Pierson. The texts were muddled by typos, but the recipients were able to deduce that Teefey was in the L.A. office, a small suite above an art gallery at the corner of Melrose and Harper Avenues in West Hollywood, where she sometimes slept, and that she believed she’d seen an intruder on the security footage. The first sentence was especially difficult to make out: “There is someone drilling on the day, and the told me to go to sleep on

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