There's a clear culprit in the rising drug overdose death count in Massachusetts — the synthetic opioid fentanyl. More powerful and more deadly than heroin, fentanyl has sparked a new set of survival rules among people who abuse opioids.
About 75 percent of the state's men and women who died after an unintentional overdose last year had fentanyl in their system, up from 57 percent in 2015. It's a pattern cities and towns are seeing across the state and country, particularly in New England and some Rust Belt states.
