Answer: Their professional expertise in behavioral analyzation, which would enable them to find and arrest the suspected person(s) involved in a case even with very little physical evidence solely through their many profiling and interviewing skills.
Explanation: The agents of the Behavioral Analysis Unit (BAU) of the Federal Bureau of Investigation (FBI) apply their knowledge of forensics, profiling, interviewing techniques and computer technology to many different types of serious criminal investigations. Many violent kidnappers, terrorists, and serial killers have been identified, located and arrested through the work of the BAU.