Less than a year ago, Pueblo was seized by a surge in violent crime fueled by gangs and heroin that was claiming innocent bystanders. But now, there’s a decrease in homicides and an increase in arrests that officials say have targeted the city’s most dangerous offenders. What’s more, investigators are hearing a message of fear from the criminals they capture: The feds are in town. The success comes from a bolstered partnership between local officers and federal law enforcement, authorities say, that has led to a major crackdown on gang violence.