Complex sentence: Despite the intricate details of von Einem's alibi and his version of events, his alibi had two huge problems--it completely contradicted his initial statement of his whereabouts on 5 June 1983, where he said he was in bed with the flu.
Split into simpler sentences: Despite the intricate details of von Einem's alibi and his version of events, his alibi had two huge problems. It completely contradicted his initial statement of his whereabouts on 5 June 1983, where he said he was in bed with the flu.