Valenti joined the Neapolitan Navy Street Gang in the early 1910s.
On July 20, 1916, Valenti and fellow gang member Nick Sassi helped George "Lefty" Esposito, Tom Pagano, and Giuseppe Verizzano escape after murdering Joe DeMarco and Charles Lombardi.
On September 7, 1916, Valenti was arrested in a local pool hall for carrying a concealed weapon.
His arrest came several hours after a shootout that resulted in the deaths of Nicholas Morello and Charles Ubriaco.
On January 26, 1918, Valenti was arrested in Troy, New York and convicted as an accessory in the DeMarco and Lombardi murders.