The IOC’s position on all of this is as follows:

“The amount of stored urine is limited, so we do not want to use it too soon (before new tests are developed) unless the intelligence for a particular new test in a particular group of athletes means that it is worthwhile.

“This is the case for a number of London samples thanks to the new test for steroids (long-term metabolites).

“Also the testing is expensive…so it makes sense to do it where there is a reasonable chance of success…

“New tests for substances other than anabolic steroids may be developed in the next three years…so unless there is a good reason, we want to keep samples until nearer to the eight years.”

All in all, I can think of no good reason why every stored sample should not undergo re-testing within eight years of collection at the very most, nor why a database should not be assembled enabling the public to compare results NOC-by-NOC, sport-by-sport.

I am not calling for the distribution plans for retrospective tests to be published, but for a detailed tally of how many re-tests have been carried out by country and by sport – and for what – to be made available after the event.

It should also be made explicitly and inescapably clear that those sports with the worst re-test records will get a big black mark against their name when it comes to working out the sports program for future Games.

I would furthermore argue that if we ever get an independent global testing authority, responsibility for re-testing these stored samples should be handed over to it.

Just because the IOC, largely, pays the anti-doping piper, by dint of having the most valuable marketing and media rights, it does not make it ideal practice for it, the IOC, to exert such a high degree of control over the re-testing of samples taken at its events.

In summary then, this battery of tens of thousands of stored samples is a worthwhile tool; if utilized to best effect, in addition to acting as a deterrent, it could enable us to map the recent past of performance-enhancing drug use in Olympic sport more accurately than has so far proved possible.

But the scope of re-testing ought to be comprehensive: all 4,770 Beijing samples should have been re-tested by now, with outcomes summarized by country and by sport in a transparent way.

If money is an obstacle to this happening, then it shouldn’t be.

The problems at Rio will leave a few unanticipated gaps for future re-testers.

As stated by the report of the Independent Observers:

“The IOC specified that the top five finishers in every event were to be tested.

“However, this was mainly focused on high- and medium-risk sports, and did not occur at every event.

“(On some occasions it did not occur due to a lack of sufficient doping control personnel at the venue in question.)”

But a total of more than 4,800 samples were, nevertheless, gathered.

And finally, sooner rather than later, control of the samples in their Lausanne depository should be handed to an independent testing authority.

By David Owen