Hi Andrew,
What I know is to become a Forensic Accountant you need to clear the CFE certification. The reason being, there might be certain laws and do's and don'ts that you must need to follow so that the evidence that is collected is valid in the court of law. Besides, I am assuming that the CFE certification will have some Ethics and rules that you need to follow. Better to be safe then sorry. Just a thought.
I'm sure in CFE there would be set of questions that needs to be asked to hold a person against. Again, only a certified CFE would have this knowledge. This is what I believe. Unless, someone who's done CMA and is practicing or has practiced Forensic Accounting can throw in some light.
Or you can join in the CFE group on LinkedIn and ask this question, may be they would answer well.
https://www.linkedin.com/company/acfe/------------------------------
Jay Chowdhury
Mumbai India
jaychwdhry@...------------------------------