Perhaps you ought to have a look at a) what your job spec is and b) what you actually do.
If you try to determine who was sat at the machine and what steps they took to download the material or you find a dodgy java script and then rather than just report its presence you investigate how it works - then investigator might be a better title.
Not meaning to be argumentative but I think a third case cold be argued.
If you try to determine what a person sitting at the computer was doing, where he/she went, viewed or enacted using the elctronic device. Surely Analyst is a better term..
But having said that maybe "Profiler" is apt.
But as a colleague just said to me " surely it's more important what you do rather than what you call yourself ", and that aspect I have to totally agree with.
Nick
The reality of the question is, future.
I have read too many resumés/CVs where titles are grandiose, weird, or simply lies.
Since my firm does not have set naming and will allow me to suggest one, it makes sense for me to select one that is accepted and understood in the future.
"Digital forensic investigator" makes sense not just to what I do today, but provides the general idea to someone reading my CV in the future.