A synthetic opioid seized in a drug raid in Cape May County in August, has only been linked to one death in the county so far, but its dangers far outweigh its brief history here, authorities say.The highly potent drug, first seen by authorities in Cape May in mid-August, has no medical use for people but has shown up in counterfeit prescription pills or in powdered form, resembling cocaine or heroin. Unsuspecting customers might unknowingly ingest, inhale or inject carfentanil, with disastrous consequences.