What is NOT a common source of human smuggling leads?

The correct choice identifies public opinions collected in surveys as not being a common source of human smuggling leads. This distinction is important because effective leads in human smuggling investigations typically stem from direct, actionable intelligence or referrals coming from credible sources, such as law enforcement, other Department of Homeland Security (DHS) entities, or firsthand accounts from individuals involved.

Developed information through law enforcement is essential since these agencies often have access to data and expertise that inform investigations. Similarly, referrals from DHS entities represent coordinated efforts to address human smuggling, leveraging information that may not be widely available. Statements from aliens indicating trafficking provide critical firsthand insight into smuggling operations, making them valuable for law enforcement.

In contrast, public opinions gathered through surveys are generally less reliable for intelligence purposes, as they tend to reflect subjective views rather than concrete, actionable information. This approach does not typically yield specific leads relevant to ongoing investigations or identified smuggling activities. Thus, it is clear why public opinions collected in surveys are not considered a standard source of leads in human smuggling cases.