Help us trace a scammer on an unconfirmed double spend

[Grinderman]

Hi guys,

I am wondering if you can help me trace the origin of an unconfirmed double spend transaction that was involved in a scam. There have been a spout of scams taking place on Localbitcoins in South Africa seemingly by the same person.

If it ends up at a mixer, well, so be it. I am unsure of how to find out which website, exchange or mixer owns an address if there is an explorer or some info you can give me to help, please do, I cannot seem to find one using my normally on point google-fu skills.

The scammer did a MITM, he purchased bitcoins from me on LocalBitcoins and at the same time opened a trade with another party on Whatsapp. He did a double spend which went unconfirmed. The other party sent the FIAT funds to my bank account after he saw the incoming transaction. I then released the Bitcoins to the scammer.

The transaction took place on 09/01/2017 20:23:18 relayed by IP 62.210.141.185 size 224 bytes

TX of double spend: bb230e2fd30ad3f73a54622b9e0f8cad3e08740773c36c954a08036d68d26ba9

Would be receiving address on double spend: 18QcZHN6Bv3EpRd6Jbfw5PPTD7RNQTjTZT

Please how do I find the senders address of this double spend?

Any further information or help would be greatly appreciated.

Yours truly,

Grinderman

[Moritz30]

I have found some more informations:
Your transaction bb230e2fd30ad3f73a54622b9e0f8cad3e08740773c36c954a08036d68d26ba9 sending 0.29999000 BTC (plus 0.00001 BTC miner fee) to Bitcoin address 18QcZHN6Bv3EpRd6Jbfw5PPTD7RNQTjTZT is conflicting with the transaction 8f1d1e2b3ada08345205abe3ad5875505e8c0ee497a13f6caced9a149768ee4d sending 0.27000000 BTC (plus 0.0001 BTC miner fee) to the Bitcoin address 1KFDAfSnRtpZRGMnoTUBrfyS4pKHmUpoRP and 0.02980000 BTC (plus 0.0001 BTC) to the Bitcoin address 1HDYituHiqMkLC7vCng3Uwxk33bqyfyRRp. The sender of both transactions is 1EoX2wybvjWHsU2uzEWHSZuqqS4RejjkgS which has committed multiple double spendings:
e9b40a3cbedde1f429bb1d549a687b8189537fed5acccc68a9e17238fe017213 conflicting with 420392e8954c8685096decf43072f8575f10c3b3e5aedd218bcd6ae3d68a0430
8f1d1e2b3ada08345205abe3ad5875505e8c0ee497a13f6caced9a149768ee4d conflicting with bb230e2fd30ad3f73a54622b9e0f8cad3e08740773c36c954a08036d68d26ba9
It has done only one not double spending transaction: e654f7767aacde593c0815dd6beb64383a45694ab9ba545a9dbec2304f5da2c9
The last and not double spending transaction is in my opinion probably to an other address owned by him. That address (12izssMnCyUR23Qaw6qV2APpufJiaMMaD1) was only used to send it's wole balance to an other address (1P1whQngiTCe6UhxwGbHPUvw4QMJT4cnKL) which did the same (to address 12M6bJTf6RqZQascEPMHGjCJo12zJBDw9p) that address did a transaction (no double spending) to the addresses 1HWHHzHjTpu5Pk2odNQtf4nxLrNu3kubRR and 13MCPWA4ue1xyADaUMEs3zkoBL2bKNjRMe.

[Grinderman]

Another thing, 10 days ago I could see the unconfirmed double spend on blockchain.info using the transaction ID, but now it is gone. How can I see it now? I want to see the origin address which I stupidly didn't save.

[Moritz30]

Another thing, 10 days ago I could see the unconfirmed double spend on blockchain.info using the transaction ID, but now it is gone. How can I see it now? I want to see the origin address which I stupidly didn't save.

It is gone because most block explorers let unconfirmed transactions disappear. A block explorer that doesn't is for example https://tradeblock.com/bitcoin/explorer/

[Grinderman]

Thanks, you're a scholar and a gentleman.

[Moritz30]

It's actually not hard to get such data about transactions. That's the advantage of Bitcoin having a Blockchain