Larry Olubamiwo didn’t test positive for any steroid

The boxer Larry “War Machine” Olubamiwo took several anabolic steroids, HGH, IGF-1 and other doping medications during 6 years. However several tests have been conducted earlier, he was caught only in January 2012. After a fight against Sam Sexton Larry Olubamiwo tested positive for banned medications. Metabolites of steroids were not discovered in his sample. The boxer tested positive for EPO. EPO represents a blood boosting medicine.
Prolonged usage of prohibited drugs by Olubamiwo was a real embarrassment for the United Kingdom Anti-Doping. Andy Parkinson, the CEO of the UKAD, tried to prove that the suspension of Olubamiwo for intake of 13 various forbidden products is a real success of the UKAD in the struggle against doping.  
Andy Parkinson claimed that it was an unusual case. The boxer took steroids and other related medications for long period of time without fear to destroy his health, career and reputation. He was sentenced to 4-year ban.
But the alarming aspect is following: Olumamiwo could avoid detection for prolonged time, despites essential efforts of anti-doping officers to “clean” sports from usage of doping medications.
Olubamiwo was caught just because the UKAD was informed by the United States Drug Enforcement Administration (DEA) that he became the target of an investigation related to illicit sale of anabolic steroids and other performance-enhancing drugs in the US. Then the UKAD conducted a test that resulted in positives for EPO.
Robert Smith, the General Secretary for the British Boxing Board of Control, supported the affirmations of Andy Parkinson about efforts and success of anti-doping agencies. He affirmed that the case displayed that cheating couldn’t be hidden.
What is your opinion about the case? Do positives for EPO and the suspension of Olubamiwo manifest that anti-doping agencies work successfully? Or does the case manifest that anti-doping policy is not appropriate?
Every person may make own conclusion. But it is clear that the boxer could take many prohibited medicines for 6 years without being caught by anti-doping officers.