this was an act of terror. reporter: the suspect had been identified and police say he entered the synagogue and took four hostages, his voice heard on livestream on the sabbath service. his demands, the release of a federal prisoner some 20 miles away, aafia siddiqui accused of murdering. the fbi said the negotiators made contact and several hours in he released one hostage unharmed. another still trapped inside said the gunman became more belligerent and threatening as the hours went by. his brother alleging the remaining hoss tax were released by a fire door, not rescued.