9.17 bitcoins were hacked from my account at cex.io. I am seeking an experienced investigator to help me retrieve the lost coins.
I had something similar occur. I lost 5+. You can trace the coins forever because you should be able to see the new address location in the block chain where the right was transferred to. The big problem that you face is that right transfers are one way. Meaning that once a right has been transferred, it can never be transferred back in it's original state before the theft.
This has some serious implications for investigation. For starters, you have to identify an actual person who controls the right. The bitcoin was designed omit identity information from the record of rights. This means that you will have to hope that the person who stole your right will reveal their identity in some way. Either thru a conversion into a regulated system, like a bank, OR some type of transaction that would require revealing a physical location that may traced back to a human identity, like a purchase of goods that require shipment.
If either of those two identity revelations do not occur, it will be impossible for you to locate the thief.
The next thing you would need to do in order to recover your right, assuming the investigator was able to identify a person thru an identity transaction (bank) or goods delivery (shipment address) is PROVE that the rights used actually belonged to you in the first place.
This is easier said than done. As I mentioned, you may trace the path of your rights inside the block chain. However, if at any point your right was merged with other right, your right technically ceases to exist. This means that all the thief would need to do is combine the arbitrary number assigned to your right (9.17) with the arbitrary number assigned to some other right and then move that right to a new location. At that point, your trail will run cold because now you have a mixed right scenario.
Their are services specifically designed to mix rights in order to prevent the type of tracing that would be required to recover your right. These services are in fact heralded by the users of bitcoin rights as a necessary anonymity tool to prevent authorities from discovering identities of individuals who trade in bitcoin rights.
In short, you are pretty much screwed. I don't believe I have read anywhere that anyone has ever recovered stolen bitcoin rights. I think it's nigh impossible, unless you are dealing with a really stupid thief. BUT, given the nature of bitcoin and all of its severe technicalities combined with the above average level of sophistication required to pull off such a heist, I have to assume the thief has the very small bases of mixing rights covered, and will most likely withdraw the right via a 3rd party that has no incentive to cooperate with your "local" authorities.
I'm sorry for your loss. Your experience has been added to a growing list of experiences that definitely call in to question the security features touted by the creators and pushers of the bitcoin.
I hope that you didn't lose a lot of money in the theft.