Plutarco Ruiz admitted to gunning down Sofia, 23, after flying into a rage after seeing her dance with another man at his birthday party, where the girls were last seen alive and then turned the gun on Maria because she was a witness to the murder of her sister. Three other men have been arrested in connection with the murders.
After he killed the women, he and his accomplices buried them near a riverbank close to where the party was held.
Ruiz took police to where he buried the bodies in the mountainous region near the border with Guatemala
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