BBC 5Live's athletics commentator Mike Costello gives his reaction to world 400m champion Christine Ohuruogu's appearance on BBC One's Inside Sport:
If Christine goal was to win over at least some of the sceptics, her approach had to soften - and it did.
The day after success in Osaka, she told Radio 5Live's Breakfast programme, in trenchant style, "I don't really have much to defend myself for . . . people can either accept that or they can leave it. I've explained and explained myself to two panels. I'm not going into all that."
Fast forward 11 days to Inside Sport and the tone has changed: "I don't wish to make excuses . . . it was a big error on my part . . . I do take responsibility . . I've paid the penalty for a huge mistake."
There was not a flicker, much less a flinch, as she addressed the most baffling - and to many the most suspicious - issue. How come she missed "not one, not two but three" tests?
She forgot. Just as Tim Don forgot. Just as many others forgot or failed to fully understand the system - until Ohuruogu (and, to a lesser extent, Don) got the red card.
UK Sport, the body responsible for carrying out the tests, reported that within weeks of Ohuruogu being suspended, the number of athletes updating their whereabouts information increased by 350%.
Becky Lyne, Britain's Female Athlete of the Year in 2006, is among a number of competitors across sports quivering on two missed tests. More than a hundred have missed at least one.
It is reasonable to surmise that the whereabouts system, introduced in July 2005, was not being taken seriously enough by Ohuruogu and others in the early stages (her first missed test was recorded in October of the same year).
Maybe an element of risk-taking was involved also, for there must have been occasions when an athlete forgot to contact UK Sport about a change and the tester did not show up anyway. So they got lucky.
In Ohuruogu's case, both UK Athletics and the Court of Arbitration for Sport in Lausanne, in their separate judgments, said "there is no suggestion that she is guilty of taking drugs". CAS added that Ohuruogu was "a busy athlete being forgetful".
In between the missed tests, and many times since the suspension was imposed, she returned negative tests, so the authorities must by now have a reasonable profile of her - compiled across not months but years.
Would the likes of Paula Radcliffe, as an anti-drugs ambassador, and Seb Coe, as London 2012 chairman, be so supportive if there was reason to doubt?
Ohuruogu said she understood that some questioned how an athlete who had been off the track for a year could rebound with such force. "If I was at home, I’d have had the same suspicions," she said.
And yet, it is not uncommon for athletes to strike form early in their season, particularly if training has gone as well as Ohuruogu's build-up. Craig Pickering equalled his lifetime best in his first big race of the season, in awful conditions in Glasgow in early June.
And Ohuruogu has done it before. Last year, because the Commonwealth Games were held in Melbourne, the British athletes were among many competing out-of-season, with scant opportunity for a competitive build-up. Ohuruogu found the sharpness to win 400m gold.
As to the relative value of Commonwealth gold, she beat the then world and Olympic champion Tonique Williams Darling into second place. Novlene Williams took the bronze, just as she did in Osaka.
Ohuruogu has a habit of producing when it matters. And on Inside Sport, her performance was assured and measured, almost nerveless. She recognised the need to become a "model athlete".
But how many hearts ands minds will be with her in the quest?