Four plead guilty in 2011 Woburn jewelry store robbery in which police officer was shot

Robert DeNapoli watched silently from the front row of a Middlesex Superior courtroom today as the man who shot him over and over during the robbery of a Woburn jewelry store pleaded guilty to more than 30 charges for planning and executing the heist with three other people. Antonio Matos, 27, paused for a long time before entering a barely audible guilty plea Monday. Hector Baez-Cruz, 23; Erianiss Murillo, 18; and Allegra Martinez, 19, also pleaded guilty to various charges.