From Adeptus Terra Presence on Juno:
Her life extended by juvenat treatments, Wilhelm is well into her second century, but the mind and body of this once much-feared officer have degraded drastically in recent years. As the situation in Askellon has grown ever darker and Wilhelm’s mind has slipped further into the depths of decrepitude, she has become ever more strident and extreme in her pursuit of the sin, conspiracy, and damnation she sees in every shadow. She has unleashed countless purges upon the sector, often with no shred of evidence of any wrongdoing. Nonetheless, Wilhelm holds firmly to the notion that the execution of one recidivist is worth the incidental suffering of thousands of the supposedly innocent, a state she holds to be at best temporary in any case.