He knew he was going down on tht finale episode as well... If you remember he was worried about buying Julie the huge house. I don't remember why though....

I found this on the website:

Caleb lets it out that he was trying to sell The Lighthouse land to Robert Campbell to save The Newport Group from going under due to its debts and losses. And only Campbell would pay premium price for the land because it would complete ownership of the coastline for him. Kirsten knows nothing of the company's struggles because the residential real estate division is the only profitable wing of the company. So thanks for blowing that deal, Sandy. And now that Sandy let the facts out, the D.A. is bound to smell blood in the water and start sniffing around Caleb's business dealings again, looking for a prosecution.

Hope it helps!! I can't believe Ryan thinks she had a miscarriage... I was sooo mad she did that , but glad he went back home.