Is there a modification or script that can...

[DPtheGod]

Roll back edits done by a vBulletin moderator or admin done to a post? For example, take Wikipedia into account. When someone edits a page, there is an option for the administrator to reverse the edits and put the "post" back in its original form. On my site, I am seeing people editing other peoples post, and it's been reported that some moderators are helping their friends out by editing things out that are breaking the rules, making it hard for us admins to discover the truth.

If anyone can help, I would be very greatful! :)

[Dismounted]

Post Edit History - It is a default feature, turn it on if you haven't already via the Admin CP.

[Boofo]

And re-think your moderator's permissions and staff status, if they are doing that.

[DPtheGod]

Ahh thank you Dismounted. Does that come with vBulletin 3.6.9? I forgot to mention that I had that version.

@ Boofo: Well, the only problem though, we don't actally know if it's happening, it's more along the lines of people see a moderator editing posts and they will say "that mod is deleting bad stuff to save their friends" or whatever of the sort. So we need to make sure there is truth before taking action.

[Boofo]

When you get to the point that you feel you that you can't trust your staff or might not be able to, then that is the point to do some staff re-arranging. Too many sites have been hacked from the inside and taken down by disgruntled staff because they felt they needed "proof" before acting upon suspicions.

[Dismounted]

Does that come with vBulletin 3.6.9?
No, it comes default in 3.7, although there is a modification that does this in 3.6.