Police in York Region are sending a strong message to those who deal, or share the drug, fentanyl.
Officers charged two people with manslaughter in connection with two seperate overdose deaths.
Both happened in February, one in Whitchurch-Stouffville and the other in Markham.
With regards to the case in Whitchurch-Stouffville, Police allege a 24-year-old woman from Mississauga gave the woman the drugs.
She was arrested in May and charged with manslaughter, criminal negligence causing death and trafficking fentanyl.
The alleged dealer was arrested last Wednesday and charged with trafficking, possession, conspiracy and criminal negligence causing bodily harm.
In the Markham case, it took officers months to track down the alleged dealer, who allegedly sold the victim drugs.
Investigators say this is the third case in the region where someone has been charged with manslaughter in connection with a fentanyl-related death.
"I do expect that this is the way we will proceed with a lot of these types of cases." says Constable Laura Nicolle.