Just minutes into the new year last year, a 22-year-old man was gunned down walking in the alley behind the Santa Ana apartment where he lived. Two days later, a 19-year-old was fatally wounded in a car-to-car shooting near the city’s Centennial Regional Park. Over the next 24 hours, two more men were killed in gun violence a mile apart in a gang-plagued area already targeted for special enforcement by police and prosecutors. The four…