Prosecutors on Wednesday charged a 21-year-old man accused of fatally shooting 10 people at a Boulder, Colorado, supermarket last month with nearly four dozen additional counts of attempted murder, assault, and weapons offenses, court documents showed. Ahmad Al Aliwi Alissa was already charged with 10 counts of first-degree murder and one count of attempted murder stemming from the March 22 shooting rampage at the King Soopers grocery store in Boulder, about 28 miles northwest of Denver. Alissa surrendered to law enforcement officers at the crime scene, about two miles from the University of Colorado’s flagship campus, after he was wounded in an exchange of gunfire with police, authorities said. Witnesses and law enforcement officers said Alissa arrived at the store in the early afternoon and began opening fire on people outside before entering the building and continuing to shoot. Ten people were killed in the massacre, including responding Boulder police officer Eric …