Joe, you forget one particularly significant distinction. The CAI is not a public company that issues stock for sale. Exxon, BP, et al do offer company stock for sale. The public doesn't invest their own $$$ in the CAI expecting an ROI. The public does invest their $$$ in Exxon, BP, et al expecting an ROI. I will heartily agree that fudging scientific data in any direction (up or down) is really bad.
However (and here's the distinction), someone fudging the numbers to pursue a personal or political agenda is not illegal. Despicable, but not illegal. Investigate all you want, probably a good idea. Strip the offenders of their status and credibility in the scientific world. File civil lawsuits if appropriate. However, someone fudging the numbers to defraud investors and protect a public company's stock price is illegal...a federal felony. RICO was created to give DOJ a tool to pursue violators. Read the history of big tobacco regarding this. They spent a huge amount of resources proclaiming the benefits of smoking when they knew smoking was harmful to health. A lot of people died while big tobacco and the gov't wrangled over the health issues.
I doubt a lot of people will die (in the USA) over climate change, however. But a lot of people will see their financial situations impacted and sometimes destroyed because of climate change. At that point, they will be filing civil lawsuits against who they view as the creators of climate change, mostly the fossil fuel industry. These litigious activities will exacerbate the financial strain on our society already stretched by the effects of the climate changes themselves. Both sides are already starting to amass resources and trying to gain influence. I read the other day that the Koch Bros plan to spend $800 million to make sure "their folks" win elections in November. The will of the people be damned. Thank you Citizens United.
Bottom line - it's gonna be a mess. And as I keep saying...no one's prepared.