"When you think about this poison - this fentanyl - one grain can kill you," McMahon explained. "Our detectives are having to gear up with all this safety equipment before we go in. Once they get in, if we find something - any kind of drugs that we think may be fentanyl - we stop, we have to get our CSI team to come in and we test that in a lab now under special conditions. So we do all that, it makes it that much more dangerous for our local law enforcement officers."