How Does a Police Officer Suspect a Driver is Intoxicated? “A police officer, if they suspect you for driving under the influence or being intoxicated while driving are going to look for, number one, how’s your driving? Are you weaving in and out of the lane? Are you using your signals? Are you, maybe, making a turn too wide? Or maybe hitting a curb? Things like that. They’ll look for that, number one.
Number two, if it’s late at night and, let’s say, they’re just following your vehicle they just want to find a reason to pull you over to maybe investigate whether you are intoxicated because many people driving home late at night, they’re usually going maybe home from the bar.
And so, a lot of times they’ll find a reason to pull you over. “Hey, his window is broken. His windshield is broken. There’s a tail light out. There’s a headlight out or he didn’t turn his headlights on,” you know, things like that. That’s what to look for to find a reason to pull you over.” – DUI Defense Philip Greenberg