Two Nashua men charged in a shooting during a botched drug deal pleaded guilty this week and were sentenced to several years in state prison. Alexandre Amado, 21, formerly of 15 Kessler Farm Drive, pleaded guilty to second-degree assault and armed robbery and will spend five to 10 years in prison after admitting to accidentally shooting Danny Vorn in the head on Jan. 9 on Rochette Avenue while trying to rob him of 5 pounds of marijuana.