Quoting from that post
HE DID NOT USE AN INTERNAL PAYMENT SYSTEM THAT PROCESSES TRANSACTIONS USING AN ANONYMOUS TRANSACTION
Why didn't he do that? I suppose the market place had a system which kinda of acts like a bitcoin-mixer to keep the trades anonymous.Not using the system could be the reason in him getting traced? Actually yes, the quote below from the post
“After observing the bitcoin ‘tip jar’ advertised by OxyMonsyter, agents conducted analysis of the incoming and outgoing transactions from that bitcoin address and learned that 15 out of 17 outgoing transactions from the OxyMonster tip jar went to multiple wallets controlled by French national Gal VALLERIUS on Localbitcoins.com.”
How dumb of him to not use a mixer?