While I was away on a business trip over Easter, I left my six-year-old son with my mother and sister, trusting he’d be safe. That night, as they were preparing their holiday dinner, the hospital called: “Your son is in critical condition.”

“Detective Hayes,” I said, turning to him, “my mother and sister are expert liars. If you show up with a badge, they’ll deny everything. They’ll hide the weapon. They’ll say he ran away or a stranger hurt him. This will become a long courtroom nightmare.”

“We have medical evidence,” he said.

“I don’t want long,” I replied. “I want them arrested today. And I know how to make them confess.”

Detective Hayes studied me.

“If they think they’re coming here to comfort me,” I said, “if they think I believe the story about Noah tripping, they’ll brag. Their arrogance will do the work for us.”

Dr. Patel gave a grim nod.

Detective Hayes exhaled slowly.

“There’s a private family consultation room beside the ICU waiting area,” he said. “We can set it up.”

Twenty minutes later, I stood in a small windowless room with a floral sofa, a coffee table, and a tissue box. Detective Hayes placed a small black recorder behind the box, the red light blinking.

“I’ll be just outside the side door,” he said. “Two officers will be near the elevators. Get them talking. Once they admit violence or locking him outside, give me the signal.”

“I’ll ask about a wooden spoon,” I said. “When I say wooden spoon, come in.”