Again, it is important to remember that the police officer is looking for little things that they can point to and say that these are particular pieces of information that show that you’re drunk. Some of the information that they identify as proof is in fact faulty evidence, but it’s part of their training nonetheless.
For example, one of the things police officers look for is whether or not the person has bloodshot eyes. Many states no longer use this as supporting evidence but the state of Colorado does.
The reason that many states no longer rely on this as supporting evidence is because it is discriminatory. There have been studies that show that certain ethnic groups have unique redness in their eyes. For example, certain Hispanics will have a higher rate of having red eyes.
While having red eyes doesn’t mean that you’re drunk, officers still look for certain factors such as this that they say are proof that you are under the influence of alcohol.
The next thing that they’ll do is start asking you a list of questions. They will ask you for your license and your registration, just like a regular stop.
Then, the police officer will ask you if you’ve been drinking. They’ll ask you to do a variety of tests. They’ll ask you to do field sobriety tests. They’ll ask you whether or not you want to breathe into a machine or have a blood test.
They’ll have you do a variety of things at the location. If they think that at that point you’re still drunk or if you’ve blown too high on the breathalyzer machine, they’ll arrest you and bring you back to the precinct where they may do additional tests and then issue you either a summons or hold you overnight for court.