He used his licensed weapons and ammunition .
On 13 March 1996 , Thomas Hamilton , a local man , shot dead 16 children and their teacher , Gwen Mayor , in Dunblane Primary School 's gymnasium before killing himself .
Thomas Hamilton used Thomas Hamilton 's licensed weapons and ammunition .
On 13 March 1996 , Thomas Hamilton , a local man , shot dead 16 children and their teacher , Gwen Mayor , in Dunblane Primary School 's gymnasium before killing himself .