After the events of that fateful night—the night that he witnessed Alicia's betrayal—Billy only had one thought.
… To make Alicia his no matter what?
He threw away his noble code and whatever vestiges of pride that were left within him.
The self control that held him back snapped, and now that he was unhinged, he could see the light.
Billy knew what had to be done.
He reached out to Evals Redart, and they both reached an agreement.
He would lure Alicia to the agreed-upon location, and that was where the deed would take place.
The only reason he was successful was due to the effects of the ring he had in his right finger—The Ring of Deceit.
All he had to do was touch Alicia with it once, and he would be able to turn into whoever she trusted most.
Earlier that day, he took the first step and brushed past her, using the ring to touch her skin.