Investigation kit on other character
I’m not sure this answers your question but I had the same problem. I did the instance with my lowest and least favorite alt because I happened to be in that area doing something else with it. I looked around and found that Dulfy site says this:
NOTE: You DO NOT need to use the investigation kit when talking to any of the NPCs. Investigation kit is only used while instance the Scene of the Crime instance.
The Burninator
(edited by JustTrogdor.7892)