I don't know how you could return to work, imagine your whole workforce knowing your brother has been up in court on an alleged peadophilia case? Also the allegations surrounding the ex-runner at TM. Even if he was "of age", it is still bizarre to have been socialising with the work experience kid on your own time, outside of work eating in restaurants etc... May not be anything legally wrong with that, but morally?!
Whilst I don't think he should be blamed for his brother's (potential) conviction, he does have to accept some accountability withholding the information until he knew he didn't have a choice.
I despise the manipulation of facts as well, its offensive to the public, police, justice system...etc to have alluded he is not close to his brother in order to save his own bacon when there is documented evidence he clearly is/was.
I don't think I'd have the front to return to work if it was me. Especially if my job regularly involved me being empathetic to abuse stories. Can hardly sanctimoniously shove pea do lists in PM's faces on the sofa now can he?!