Complex sentence: Journalist Joe Tiernan suggested that Hanna was shot for refusing to participate in the Miami Showband attack and that he had become an informer for the Gardaí in exchange for immunity from prosecution for the Dublin bombings.
Split into simpler sentences: Journalist Joe Tiernan suggested that Hanna was shot for refusing to participate in the Miami Showband attack. He also alleged that Hanna became an informer for the Gardaí in exchange for immunity from prosecution for the Dublin bombings.