To understand why officers will conduct a **second breathalyzer test** if a person shows symptoms of being under the influence of alcoholic beverages, it is important to consider the standard procedure for alcohol detection tests.

- **Initial test:** When a traffic officer suspects that a person has consumed alcohol, they ask them to blow into a device that measures the amount of alcohol in the blood. This is the first test.

- **Symptoms of consumption:** If the person shows **symptoms of having drunk**, such as erratic behavior or alcoholic breath, the officers have the authority to conduct a **second test**. This is done to confirm the results and ensure that the person is not driving under the influence of alcohol.

- **Confirmation of results:** The second test is crucial to confirm the driver's condition. If this test also comes back positive, more severe measures can be taken, such as penalties or immobilization of the vehicle.

Therefore, conducting a second test is a necessary step when there are clear indications of alcohol consumption, even if the first test does not exceed the permitted limits.