First it was a bomb threat leading to the evacuation of residents living near the Blair County Courthouse. Then it was a vague threat about the water supply that forced thousands of people to find alternate sources for drinking water and businesses to shut down. Both threats proved to be false alarms but it was some week for the Hollidaysburg area. Now investigators say they are getting closer to figuring out who was behind threats. Officials aren’t giving out much information about the investigation but they do believe they have a suspect in mind.