“This wasn’t guesswork,” Wren said. “Whoever specified this frequency had read the literature. There are exactly three published papers documenting the range at which electrical system resonance triggers a threat stimulus in dogs with acute auditory sensitivity. This seems deliberately done.”
“The consultant who signed the specification,” Marcus said. “Who does he work for?” Wren slid a corporate registration across the table—attached to the invoice, a Delaware consulting firm. Marcus typed a search that should have taken thirty seconds. It took three.