HOLYOKE — Federal investigators say the alleged “Newton Street DTO” used drug runners, rear alleyways and fentanyl stamped “Nipsey Hussle” to distribute thousands of bags of narcotics in Holyoke.FBI Special Agent Christopher Barbadoro alleged in a criminal complaint filed Tuesday in U.S. District Court that Jose Luis Alvarado Gonzalez Jr., Eric Javier Ramos Berrios and Samuel Colon Rosado participated in the fentanyl-trafficking organization.