Culprit broadcast signal that triggered Dallas’ emergency sirens Friday night

The Dallas Morning News | April 25, 2017

Armor Chief Security Officer Jeff Schilling talks to The Dallas Morning News about how the city should approach strengthening the its emergency siren system that set off 156 sirens across the county unexpectedly. “If I were doing the investigation, the first thing I would be looking for is former and current employees who have extensive knowledge of how the system works, or contractors or maintenance people who have worked on the system,” Schilling said. “It’s very unlikely that someone did this with their own radio gear.”