My 7-year-old grandson leaned toward me and whispered: “Grandpa, when you leave for Dallas, Mommy and Daddy are going to keep all your money,” and in that instant, I understood why my daughter was so insistent on knowing the exact time of my flight; what she didn’t know was that, behind a simple signature, there was something capable of snatching away much more than my savings.

—“Who suggested using the medical route?” I asked. Steven exhaled, defeated. —“I don’t know the full story. A friend of Lucy’s. Someone who knew Dr. Varela. She said it would be more orderly. More… defensible.”