Federal, state and local investigators are combining forces to find who's responsible for the Moore County substation attacks. WRAL Investigates' Cullen Browder talked to a former FBI special agent about what's happening behind the scenes. . Subscribe to WRAL: https://youtube.com/c/wral5 Follow WRAL: Facebook: https://facebook.com/WRALTV Twitter: https://twitter.com/WRAL IG: https://instagram.com/wral About WRAL-TV: WRAL is your Raleigh, North Carolina news source. Check out our videos for the latest news in Raleigh, local sports, Raleigh weather, and more at https://WRAL.com #localnews #northcarolina