Toxicologist testifies at trial of Ontario man who admitted to setting ex-wife on fire
The expert said there was no way of knowing how much fentanyl there was in the man's system because the urine sample taken after the attack only detected the drug, not how much.
Tomas Kauer - Moderator 
The expert said there was no way of knowing how much fentanyl there was in the man's system because the urine sample taken after the attack only detected the drug, not how much.
