1. Driving under the influence

2. Driving erratically
If an officer sees someone driving
erratically, they can usually tell if someone
is driving under the influence by using
some of the following signs.

3. Driving erratically
Swerving Unnecessary
stopping
Speeding or
driving too slow
Running a red
light
Reckless
driving
Driving with a
broken tail light

4. Witnesses
The police can find out if someone is
committing DUI if they saw the act
themselves, received a report through the
radio, or a witness reported to them.

5. Witnesses
Witnessed by the
officer themselves
Witnessed by
other people
Reports over the
radio

6. Observing behavior
consistent with intoxication
If the police has stopped your car or is
patrolling on foot, they will usually notice if
someone is drunk, and determine if they
are fit for driving.

7. Observing behavior
consistent with intoxication
Failing field sobriety
tests
Drowsiness Aggression
Slurred speech Unstable movement
or posture

8. Incriminating evidence
The police use supporting evidence to
claim that the driver is driving while
intoxicated. Drivers can still be arrested if
their BAC is over the limit within 2 hours
after driving.

9. Incriminating evidence
Presence of
alcoholic beverages
in the vehicle
In a location they
can only reach by
driving
Social media Smell of alcohol or
intoxicating
substances

10. BAC Testing
A person cannot be charged if they just
look drunk, they have to be intoxicated
enough to be judged too inebriated to
drive. Thusly, tests will be performed on
the alleged drunk driver. If they also find
that the driver is beyond the BAC limit,
they can be charged with drunk driving.

11. BAC Testing
Refusing to
be tested
Breathalyzers
Urine testing Blood testing