Lags are smuggling the mind-bending drug spice into their cells by having it sprayed on to undies.
They are then cut up and smoked by inmates.
A source inside Doncaster prison, South Yorks, told us: “They’re bringing it in sprayed in boxer shorts and smoking the thread.
“If there’s no Rizlas they use the paper hats the kitchen staff wear.”
The trick is exposed as we can reveal how a prisoner died of an alleged spice overdose at the same jail a few hours before he was due to be released.
John Taylor, 35, is believed to have taken the zombie drug mixed with lethal fentanyl. He was found in his cell after another prisoner raised the alarm.
Taylor was due to be released last Monday after serving half of a 12-month stretch for attacking his grandfather while high. An insider at the privately-run jail said staff fear there will be more deaths involving spice mixed with the opioid.
The toxic cocktail has been dubbed “man down”.
Our source said: “The screws [prison officers] are walking around with masks on because of the fumes. It’s deadly s*** – it’s killed one and more will follow.”
“After the kid died last week screws found 100 sheets of paper aced with Spice in one guy’s cell.
“They’re even bringing it in sprayed in boxer shorts and smoking the thread.
“Sometimes if there’s no Rizzlas they use the paper hats the kitchen staff use.
“It’s out of control and getting worse.”
Taylor was drugged-up when he bit of grandad’s nose and beat him with a bat in a savage assault.
The grandad, who was treated for multiple injuries, said he knew Taylor was on drugs on told police: “I just feel sorry for him and don’t bear him any malice.”
Serco, which runs the unit, confirmed the death and said it was investigating drug use.