A New Bedford man is sentenced to up to seven years in prison for a string of robberies last year. According to New Bedford Police, 28-year-old Johnny Ortiz of Belleville Rd. held up three convenience stores at knifepoint within a week-and-a-half of each other in February 2012. Ortiz was sentenced to four-and-a-half to seven years in state prison for the robberies. No one was hurt during the robberies.