Then he listened to the audio recording captured by one of the onlookers’ phones.

Christopher’s voice was faint through the speaker, but his words were unmistakable: “Old hospital project.

Basement.

Do not trust anyone from the firm.”

Detective Miller took Valerie’s smartphone into custody as key evidence.

Before placing it into a protective bag, Martha pointed directly at the call log on the screen.

“Examine those recent incoming calls,” Martha urged the detective.

Multiple calls had been received from unidentified or blocked numbers, including one specific contact that appeared almost every night around ten-thirty.