Complex sentence: However, Roe had refused to surrender control of his operation as the Outfit had demanded; on June 19,1951, Roe fatally shot Lennard "Fat Lennie" Caifano, a made man in Giancana's crew.
Split into simpler sentences: However, Roe had refused to surrender control of his operation as the Outfit had demanded. What is more, on June 19,1951, Roe had fatally shot Lennard "Fat Lennie" Caifano, a made man in Giancana's crew.