Santos was wearing a black hoodie, black sweatpants and red and white Nike tennis shoes when she left. Her hair is bleached and she may be wearing glasses.
She is 5-feet tall and weighs 115 pounds.
Police said she may be with her boyfriend who travels to and from Houston.
Anyone with information is asked to contact police at 210-988-1536.
If you have any information about this missing person, please contact Sgt K Molder.
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