 The source has been briefed, tells ABC News the shooter had no ties to extremist organizations or other individuals. The official says the FBI is investigating Thomas Crook's phone and computer. Pennsylvania State Police Lieutenant Colonel George Bivens. At this time, we have no reason to believe that there is any other existing threat out there. This is ABC News. Sponsored by Annuity General. Producers have the appropriate licenses for the products they offer. Increased income is possible using strategies suited to your goals and may require buying multiple annuities and holding them full term.