I sent him a 1,25 btc, he had to send me 50000 XRP. Here is proof that I sent him the 1,25 btc:

https://blockchain.info/address/15um7gwxaPUECb7AnxX2MJw4WtSa9Y31d6

I ask board administrators to give me his IP. If he does not return to me my bitcoins or ripples, i appeal to the police.