Dallas April 10, 2017 5:20 pm FBI Joins Investigation Into Hack of Dallas Sirens The FBI has now joined the search for the person who hacked into the Dallas emergency siren system over the weekend, setting off all 156 sires when there was no emergency. Local 2:14 New Dallas police chief expected to be hired this week 5:25 Crockett fallout and 2026 already 0:55 City of Fort Worth hosts send-off party for Oscar nominee Abraham Alexander 2:10 Gainesville digs out after snowfall on Thursday night 2:25 ‘Everyone was slipping and sliding': Fans arrive in Arlington for Cotton Bowl