Jackie is an Italian-American ex hitman of the Franchetti crime family and protagonist in the The Darkness series. The crime family was once led by his uncle, Paulie Franchetti, but after Jackie killed him in revenge for the murder of his girlfriend, Jenny Romano, Jackie became the leader.
Jackie is also the current host to the Darkness. With the help of Johnny Powell's profound knowledge on the demonic power, Jackie was finally able to contain the Darkness. This was short lived, however, as the Darkness came crawling back 2 years later, giving birth to the events of the second game in the series.