MONTERREY, Mexico (Reuters), May 13 – After an autopsy revealed that a Mexican adolescent girl had been severely sexually raped and murdered, President Andres Manuel Lopez Obrador swore on Friday to bring justice to her killers.

“I pledged to help clarify what happened and assure there is no impunity,” Lopez Obrador said at a press conference after visiting with the parents of Debanhi Escobar, whose murder last month sparked nationwide outrage about violence against women.

The 18-year-old law student vanished on April 9 in the northern state of Nuevo Leon, amid a wave of female disappearances. Her body was discovered buried in a cistern at a motel near where she was last seen alive over two weeks later.

According to the Spanish newspaper El Pais, which first published the findings, an independent autopsy indicated that Debanhi’s skull had been repeatedly bludgeoned by a “blunt object” and that she had injuries around her genitals indicating sexual assault.

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In an Instagram video posted after the article’s release, Debanhi’s father, Mario Escobar, accused the state attorney general’s office of leaking the document.

The attorney general’s office had earlier stated that the cause of death was a “deep contusion to the skull,” but did not reply to calls for clarification.

Local officials claimed she died after falling into an underground water tank by accident for weeks.

After seeing Lopez Obrador, Escobar told reporters, “We want answers, and we want them to tell us the truth.”

In Mexico, ten women are assassinated every day on average, and tens of thousands more remain missing.