PART 2: THE DEEP ROOTS

The room held that sentence. Lillian's face stopped performing shock. What was underneath was a face that had been caught.
The rest happened quickly in the procedural language of warrants and handcuffs. Thomas watched from the bed. His father stood at the window with both hands pressed flat against the glass, unable to process the reality of the woman he married. Rachel set the saw down, removed her gloves, and placed them in an evidence bag Morrison had ready.
They had done this together before. Not this specific case, but this exact shape of case.
Three years ago, Detective Morrison had read a sharp resignation letter Rachel had filed with the state nursing board. It was the letter that accompanied her abrupt departure from Mercy General Hospital—the one that described a bizarre, unexplained toxicology anomaly in the sudden death of a patient named Catherine Voss.
Catherine Voss was Arthur's first wife. The case had been filed as an inconclusive cardiac event and quietly closed.
Morrison had tracked that file, kept it, and called Rachel the second Lillian's name appeared in a new family context. They had been building the trap ever since. Seven weeks of undercover monitoring inside the house. Eleven minutes waiting outside the door on a Thursday morning.
Later, when the room was quiet and Arthur was pacing the hallway on the phone with lawyers, Thomas asked the question that had been burning in his mind.
"When?" he asked Rachel. "When did you know for certain it was the brace?"
"Week three," Rachel said. "When you described the wet feeling without me prompting you. The symptom profile matched a very specific industrial compound. It wasn't a mechanical device issue. It was a deliberate chemical one."
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"But you stayed four more weeks," Thomas whispered.
"I needed the patch," she said. "Description isn't legal evidence. The patch is evidence. And I needed Morrison in exact position before I opened it, because the moment I exposed her, everything would move very fast."