Final answer:
Profiling in serial killer investigations can lead to successful predictions or limited effectiveness, dependent on the skill of the profiler and the methodology used.
Step-by-step explanation:
The use of profiling in serial killer investigations has led to a range of outcomes, from successful predictions of criminal behavior to limited effectiveness in solving cases. The effectiveness can vary significantly depending on the profiler's skill and the methodologies employed.
However, this approach can have its limitations. Criminals do not always behave in predictable ways, and individual variations, the type of crime, and geographic peculiarities of the region can affect the outcome of geographic profiling. Moreover, methods such as Rossmo's Formula require advanced knowledge and can bring complexity to investigations.