Of course the elders change the subject. You are not supposed to know about their policy regarding sexual offenders.
But probably the society has more control of a molestor that is still inside the congregation than outside it.
Furthermore, if they should DF him, that would be an indication that he is guilty, and then there would be a risk that some people wold like to report it to the authorities, and that will bring "reproach on the congregation and on Jehovahs name"
So they prefere DF'ing teenagers that partied a bit wild and maybe smoked a ciggarette. It is ridiculous, but true.