Final answer:
The primary reason an employer must perform a criminal background check on new aides hired is because the law requires it for the protection of residents.
Step-by-step explanation:
The primary reason an employer must perform a criminal background check on new aides hired is because the law requires it for the protection of residents.
Employers in fields such as healthcare, education, or childcare are legally obligated to ensure that the individuals they hire do not pose a risk to the safety and well-being of others. By conducting a criminal background check, employers can identify potential employees with criminal records who may have a history of violent or abusive behavior, theft, or other offenses that could harm vulnerable populations. This helps maintain a safe and secure environment for everyone involved.