Without waiting for Sandra's reply, Lionel turned and left, instructing the doctor to treat her wounds properly.
She was, after all, seriously injured, and her wounds could get infected if not treated promptly.
Whether Sandra got an infection or not was of little importance to him, but he couldn't risk her holding a grudge against him for neglecting her injuries.
He had to make sure her wounds were treated. Otherwise, she might really turn on him and lie again after he’d gone through the trouble of collecting evidence.
As for how to find that evidence, he already had an idea. Since Quennel had indeed held Sandra captive there for some time, the house must be full of clues. He was sure he could find something to prove it.
He was eager to start his search, completely oblivious to the fact that Hannah already knew who the culprit was and simply didn't care.
He was just acting on his own misguided assumptions.
The doctor worked without exchanging a single word with Sandra, focusing solely on treating her wounds. When he was finished, he left a few packets of pills and explained how to take them.
He pointed to one specific packet. “These are painkillers. Take one when the pain is severe, but not otherwise. They're expensive. Even if you skip the other anti-inflammatory pills, you must take this one. When the anesthetic wears off, the pain will be unbearable.”
Sandra paid no mind to the doctor’s instructions.
Even after he left, she ignored the pills on the table.
Night fell. The wind rustled the tree branches, making a soft whooshing sound she could never have heard in the basement.

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