"...But… things went south when Ruven discovered something."
"What?" Rachel asked, her hands clenching into fists.
Lenny's eyes narrowed, reflecting the light as he leaned forward, "It was bound to happen sooner or later, but Ruven found out that your dad was kidnapping demons from the other side and bringing them over here. It didn't take much for him to guess that Derek had other intentions, especially when the tech hadn't been perfected yet."
Rachel felt a shiver down her spine but somehow kept her breath steady as she asked, "Kidnapping demons? Why?"
Lenny's lips twisted into a sardonic smile, "Why, to create a demon army, of course. Or that was the plan your dad had in mind. To destroy demons using demons. Sounds like a novel idea, right? I'm sure he must have felt very proud of pursuing such an idea despite the risks."