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Sara María Aldrete Villareal (born September 6, 1964) is a Mexican serial killer known as "La Madrina". Born in Matamoros, Tamaulipas, Mexico, she attended high school in Brownsville, Texas, United States, while still living south of the border, and gained resident alien status so she could attend Texas Southmost College. She was known among her peers as a good student. She is 6 ft 1 in (1.85 m) tall and studied physical education, preparing to transfer to a university to earn a physical education teaching certification.
