Horrible writing:
Elisa Baker was convicted of second-degree murder last year in the death of Zahra, who had a prosthetic leg and hearing aids from a battle with cancer.
^^^
What in the heck does that sentence actually mean?
At a guess, Zahra had had bone cancer in her leg which required amputation, and suffered hearing loss from the chemotherapy.
Of course, even with that stated more clearly, it would still be a badly written sentence.