The woman, in long-term care since she was 3, gave birth to a boy in December although no one at her health care facility knew she was pregnant.
The new study debunks the myth that genetics plays a larger role than health disparities in risk of death from prostate cancer for black men.
Prosecutors in Pittsburgh have previously indicated their intent to seek the death penalty against Robert Bowers, but a final decision rests with the U.S. attorney general.
"Every time you went home at night, you would think about if we don't catch this guy, someone else is going to be murdered," one investigator said.
Her fall was broken by a tree, which prevented her from falling into the ocean below, and she later succumbed to her serious injuries.