MIAMI — A former federal agent and three others were indicted this week on charges of dealing painkillers in Miami-Dade County, including an allegation that the agent tipped off the ring under investigation. Alberico Ahias Crespo, an ex-agent with the Department of Health and Human Services who had worked on a federal strike force over the past decade, was charged with conspiring to distribute Oxycodone, witness tampering and obstruction of justice. Crespo’s defense attorneys, Marc Seitles and Jose Quinon, declined to comment Friday. Crespo, 46, was charged along with three alleged members of ...