Complex sentence: His manner in saying this roused suspicion that he knew more of Clark's disappearance contested that he had been present at the murder of Clark by him and another man, Terry, of whom nothing further is heard.
Split into simpler sentences: His manner in saying this roused suspicion that he knew more of Clark's disappearance. When questioned, he contested that he had been present at the murder of Clark by him and another man, Terry, of whom nothing further is heard.