Actually, that's not a bad idea. It would probably help to at least start the ball rolling on a case file being created which will allow Eric the opportunity to prove the identity theft element of this fraud. There is definitely a case for him to push for action on the basis that this scam is directly impacting him due to the allegations being posted by the scammer/shill accounts which detail his personal information while accusing him of criminal activity.

If they collect enough information about the scammer ip addresses, including the sock-puppet accounts they use here, it should be relatively easy to build an accurate picture of the unfolding events leading up to and during the period of time they were collecting investment funds through false misrepresentation.

Unless the fraudsters maintained a consistent use of ip masking or tor for each and every account they control, which I doubt they posses the discipline and patience for, it won't take much time or effort to collect and collate the account data.