This DUI investigation is by the book. This baltimore city police lieutenant knows how to do a DUI. This is how you ask questions to the driver and get the information before having to read Miranda. comment in the comments section all the clues that you saw in the video. In this video you will be sure to learn how to do a DUI investigation like a pro. 00:00 INTRO 00:30 initial approach 03:11 WHAT? 04:38 investigation into disorderly conduct 05:17 horizontal gaze nystagmus text 07:27 walk and turn test 09:24 Finds 15 pack 10:35 breath test results #dui #fieldsobrietytest , #hgn, #probablecause, #policeinvestigation