Police say that Roush's mother, Teresa Poehlman, threatened to turn the 22-year-old woman in to authorities for prostitution. This enraged Roush, who then reportedly told her boyfriend that she needed to "take care of her mom." She feared that if Poehlman was successful in turning her in to police for prostitution, then it would jeopardize her chance at regaining custody of her child. Apparently she didn't think murder would jeopardize those chances. It's probably safe to say she won't be getting custody of her daughter now.
Both Roush and her boyfriend, Matthew Isbell, have been charged with first degree murder. Prosecutors believe that, even though Isbell gave them information leading to the solution of the case, he was still an active party in the murder. His claims of being an innocent witness don't exonerate him, because he reportedly drove the woman to the place where she was murdered, not doing anything to stop the event.