Blake Overdosed On Jail Heroin

Blake Fielder-Civil is a quivering mess. He thought he won the lottery when he found some heroin in jail. Nope! It was poison and almost killed him. News of the World is there:

Guards found the 35-year-old writhing in pain and vomiting violently in a cell.
They instantly set off alarms and activated emergency procedures to save his life.
A probe was launched and prison officers found he had taken a drug believed to be heroin, mixed with a toxic substance.

I never knew you could overdose from heroin mixed with poop. 'Cause you know that shit was smuggled in up some guy's hole.