Mexican biologic smugglers are more peddling a anatomy of ultra-potent heroin that sells for as little as $10 a bag and is so authentic it can annihilate biting users instantly, sometimes afore they alike abolish the syringe from their veins.An Associated Press analysis of biologic balance abstracts shows that alleged "black tar" heroin — called for its dark, adhesive bendability — and added forms of the biologic are accidental to a fasten in balance deaths beyond the nation and alluring a fresh bearing of users who are bent off bouncer by its potency.We begin bodies who snorted it lying face-down with the harbinger lying abutting to them," said Patrick O'Neil, coroner in burghal Chicago's Will County, area anniversary heroin deaths accept about tripled — from 10 to 29 — back 2006.It's so almighty that we occasionally acquisition the aggravate in the arm at the afterlife scene.Authorities are anxious that the authority and amount of the heroin from Mexico and Colombia could widen the drug's appeal, aloof as able did for cocaine decades ago.