Possible Clues:

• Drug used to treat addicts
• Satisfied, having taken single drug
• Desperate men head to addiction treatment
• Gas encircling same drug
• Satisfied individual had injected analgesic
• Yard held individual with a drug
• Gathered somebody seen outside was in possession of drug
• Conned into deal to procure drug
• Death may result in shortage of cash for drug
• Synthetic drug taken to replace heroin