A 27 year old New Bedford Man, Matthew Pattee of Ash Street, was sentenced Monday in Fall River Superior Court for a series of convenience store robberies at knifepoint in New Bedford last summer. Pattee was sentenced to 5 to 7 and a half years in state prison for 4 robberies on Rivet Street and Rockdale Avenue and will be on probation for 2 years once he's released from prison. New Bedford Detective Michael Carrier investigated the cases.