>> open the door! open the door! >> do you guys mind explaining why we have to put these masks on? >> the short answer is, if you breathe it in, you can die. >> you said you have a nickname for this street. >> morgue. morgue avenue. >> you literally walked in to cash a check. by the time your brother had got in an accident and told paramedic he was on fentanyl. what's it like to go through this? >> hell. hell every day it is hell. ♪ welcome to montgomery county, ohio, where thanks to a drug so powerful it could kill you if you touch it, police work isn't what it used to be. why is a sheriff's deputy supposed to be fighting crime driving around with a heroin antidote? >> we don't have enough ems