A friend recently received two job offers. He accepted one and rejected the other. The employer he accepted subsequently withdrew the offer because of what came up during a background check. He has asked the employer for the substance of the background check that was grounds for withdrawing the offer, but has not received any response. Is there any requirement that this information be shared, since it was the basis for terminating a contract?

Furthermore, if one rejects an offer to accept another, does the withdrawal of the other offer constitute a tort, e.g., violation of promissory estoppal?