Complex sentence: Moore comes to the conclusion that these and other media influences do not necessarily lead to copycat cases and makes a link between the fact that the two murderers started the massacre while the war in Kosovo was on and the fact that they went bowling before the massacre.
Split into simpler sentences: Moore comes to the conclusion that these and other media influences do not necessarily lead to copycat cases. He states that the two murderers committed the massacre while the Kosovo War was occurring and that they went bowling before the massacre.