Initially , much of this material was in magazine and photograph format , although he later expanded this material to include videos depicting graphic child sexual abuse .
Via a contact he had met at a King 's Cross bookshop , Black began to collect child pornography .
Initially , much of this material was in magazine and photograph format , although Black later expanded this material to include videos depicting graphic child sexual abuse .
Via a contact he had met at a King 's Cross bookshop , Black began to collect child pornography .