Kern County District Attorney Lisa Green said earlier this week that she wouldn't retry Benavides for first-degree murder and that without the medical testimony, a lesser conviction would be nearly impossible.
"Upon an objective review of the facts, there is insufficient evidence to establish guilt beyond a reasonable doubt," she said in a statement.
Benavides was babysitting his girlfriend's daughter, Consuelo Verdugo, in Delano on Nov. 17, 1991, while her mother was at work. Benavides told police that he had lost track of the girl and later found her outdoors, vomiting. He and the girl's mother took her to an emergency room and she died a week later.
A forensic pathologist concluded that the girl died from anal injuries from being sodomized, and several doctors testified that the girl's injuries were caused by sexual assault.
But nearly all later recanted, saying they hadn't seen her full medical records that indicated there was no evidence of sexual assault when the girl was first hospitalized.
They also said her genital and other injuries may have been caused by her medical treatment and some said the purported cause of death was "anatomically impossible," according to the state Supreme Court's ruling.