I can't find anyone by that name , do you mean this one
https://bitcointalk.org/index.php?action=profile;u=222788 ? Selene72 ?
I see indeed a password change recently , you had to check his trust before trading with him and the value of his trades wasen't really that much and you went directly trading with him without using any Middleman .
To be honest , if he went he will never come back because his account don't worth 1 BTC and he have nothing to lose on leaving , he can just make a new account on this forum .
However you should post some
proofs (PM screenshots or whatever you used to contact with him) then we can judge and people will leave him negative feedback if needed .
EDit : come on man ..; you got also scammed here ?
https://bitcointalk.org/index.php?topic=1122194.0 , you have to learn from your lessons and not do the same mistake twice and it's even worst this time ... :/ the people that you can trade with them without using an escrow are known like monbux , master-p , devthedev , Muhammed Zakir or escrows which handle more then those amounts usually . but trusted a random senior member after a bad experience isn't the best idea to be honest