Complex sentence: His criminal background was discovered by the media during the election campaign, and was reported in newspapers across Canada; he initially denied having a police record, but acknowledged the truth after being presented with incontrovertible evidence.
Split into simpler sentences: His criminal background was uncovered by the media during the election, and was reported in newspapers across Canada. He initially denied having a police record, but was acknowledged the truth after being presented with incontrovertible evidence.