Klaus, are they really a credible or indeed any opposition? But anyway that aside the only way to be such is to be honest so ALL checks out. Her absence of any physical evidence to support the claimed abuse is a key point and needs to be explained convincingly. The absence per se does not mean she was not abused in the manner she claimed, BUT what was explained by her is something that is factually not correct...those drugs will do nothing to prevent the appearance of marks and bruises. Thus her creditability is questionable. That does not mean it is or is not true, but allows a VERY LARGE amount of doubt and accordingly loss of validity in persuading a cynical audience.