A member of the Audit team Runa A. Sandvik is saying this;
Results from phase one of the review released last month revealed no evidence of any backdoors. A second review is still pending.Encryption Tool Endorsed By Snowden Abruptly Shuts Down - ForbesIt is unclear whether the TrueCrypt developers were compromised or if this is all part of an elaborate plan to end development of the widely used tool.
You can sell encryption without a backdoor, its just that the NSA has so much money to pay companies off for a backdoor that most people just take the money.
TrueCrypt Security | Mark Lyon
This is a reasonable explanation of the issue by Mark Lyon, who is both a lawyer and a computer expert and who has worked of the US military. He explains that he uses Truecrypt as a standard tool for transporting legal eDiscovery data.
BitLocker is not an appropriate solution for eDiscovery file transport. First, it is included as part of only certain versions of Microsoft Windows. Unlike TrueCrypt, it’s not compatible with other operating systems. Its security is also highly questionable – Microsoft clearly explains that in a non-domain environment, copies of the keys necessary to decrypt the container are sent to and stored by Microsoft.