Complex sentence: Once Keane is dead, Warden Leo Glynn informs L'Italien that his appeal has been denied, after hearing this information, L'Italien confesses again to Jennifer's murder to a confused Glynn.
Split into simpler sentences: Once Keane is dead, Warden Leo Glynn informs L'Italien that his appeal has been denied. L'Italien then confesses again to Jennifer's murder to a confused Glynn.