Which of the following is NOT an example of indirect tracing of illicit income?

Indirect tracing of illicit income involves methods that derive conclusions about financial activity indirectly rather than through direct evidence. In this context, direct witness testimony stands out as it offers firsthand accounts of activities, making it a direct source of evidence rather than an indirect method of tracing incomes.

On the other hand, the other options—bank records analysis, asset enhancement reviews, and transaction pattern analysis—are all considered forms of indirect tracing. They rely on analyzing documentation, patterns, and overall financial trends to draw conclusions about illicit income without direct observation of the illicit activity itself. These methods can reveal discrepancies or patterns that suggest illegal activity, but they do not include direct testimonies or confessions from witnesses. Therefore, identifying direct witness testimony as the only method that does not fit the indirect tracing category is crucial in understanding how different investigative approaches are classified.