What if a ditch crash hides impairment? Witnesses report swerving into oncoming traffic. Suspect admits near miss. Could meds or substances explain the dangerous driving? >> That way. Oh, wait. Hold on. I >> Where you coming from? >> From literally right north Miami. >> What were you doing in North or no? >> I know. I was just hanging out with friends, but I just got off of mine. Oh [ __ ] Hi, man. >> No, I need a tongue. Huh? >> No. I was blowing into your mouth so you could smell. >> So, you're not drinking? >> No. No. No. Are >> you on any medication? >> No. No. No. >> Sure. >> I'm sure. >> Yeah. No. That's why I'm just trying to get it to >> open a new request. >> 13th. What day of the week is it >> now? It's Wednesday. >> Okay. And what? >> Oh, you think I'm going to pass? And if you just leave >> leave the flash away. >> If you had to guess, what time is it? >> Um, >> I want you to follow with your eyes, not with your head. Do you understand? Don't move your head. >> But your eyes are doing this. And that only signals two things. either drinking or you use some kind of drugs. >> No. >> So, which one is it? >> But I >> Okay. >> No. >> Okay. And just tell them they don't need Okay. I'm going to demonstrate four physical performance exercises to you and give you an opportunity to take the I'm going to demonstrate the exercise to you and I'm going to get provide you an opportunity to placing you under arrest. driving. >> Failed sobriety tests and medication admission lead to Dwey arrest for chemical influence. Officers secure scene safely. Tough, but necessary. What do you think? We do.