According to deputies, the body was found in a canal near Miller Street in Anahuac.
A Silver Alert was issued for the 72-year-old woman earlier in the day.
Bettye Robinson was last seen Saturday at about 9:30 p.m. on North Main Street in Anahuac after leaving her son's residence on foot, officials said.
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According to family, Robinson had early onset dementia and believed she was still in upstate New York.
Officials described Robinson as a Black female, 5 feet, 5 inches tall, with black hair and brown eyes.
The cause of death is unknown at this time.
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