My brother-in-law called from his business trip and asked me to water his plants. But when I unlocked his house, I found his frail, delirious niece curled up in a filthy spare room

Leo’s revelation echoed in my head like a siren. If Arthur had murdered my sister to cover up massive financial fraud, the evidence had to be somewhere.

I left Leo under armed police guard and drove back to Arthur’s house.

The crime scene tape fluttered in the misty morning breeze, but Detective Miller allowed me inside to gather a few of Claire’s old belongings that I needed for comfort.

I stood in the den, staring at the massive saltwater aquarium. “Could you feed the fish?” Arthur had asked. It was a bizarre request. He had an automatic feeder. I could see it clamped to the side of the glass, fully stocked with pellets.

Why send me here? Was it a test? Or did he want to frame me for finding Leo dead?

I walked closer to the tank. The water bubbled furiously from the heavy-duty filtration system in the corner.

Something caught my eye—a flash of neon green plastic wedged behind the intake tube. I rolled up my sleeve, plunged my hand into the frigid, salty water, and pried the object loose.

It was a waterproof canister, the kind scuba divers use to keep matches dry.