For secondary inspection, what level of suspicion triggers a referral for additional investigation?

In the context of secondary inspection, the referral for additional investigation is triggered by some or mere suspicion of immigration violations. This indicates that investigators do not need to have conclusive evidence or high levels of suspicion before proceeding with a more thorough examination. It allows for a proactive approach to enforcement where even slight indications of potential violations can lead to further scrutiny.

The rationale behind this is that immigration enforcement aims to ensure compliance with laws and regulations, and early intervention at the level of mere suspicion can help identify and address potential violations before they escalate. This threshold avoids possible gaps in enforcement by enabling officials to take action when there's enough suspicion to warrant a deeper look.

In contrast, high suspicion would imply a stronger justification for investigation, while certain proof of wrongdoing sets a much higher bar that is unlikely to be met without conducting the investigation itself. The notion that no suspicion is required would undermine the integrity of the investigative process, making it impractical and inefficient in identifying violations.