A 31-year-old man was arrested Sunday after a 15-year-old girl accused him of raping her for about a year, sometimes after he picked her up from school.

The suspect, David Allen Sanders of San Antonio, now faces a charge of continuous sexual abuse of a child. He was booked into the Bexar County Jail.

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According to his arrest report, the victim's mom suspected the two of having a sexual relationship. On Sept. 16, the victim's mom searched through her phone for evidence, upsetting the victim and causing a physical fight between the two of them.

The mom eventually found Facebook messages between the victim and Sanders that indicated the two were involved in an inappropriate relationship. The woman turned over the phone to police as evidence.

In late December, police interviewed the victim. She told them that Sanders "had been sexually abusing her for well over a year," between the summer of 2016 to summer 2017, the affidavit says.

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"Due to the victim being traumatized by the events, she said her brain has suppressed much of the events after she began to describe [Sanders] taking her clothes off during the different times he would 'rape' her," the affidavit says.

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She told police that Sanders forced her to perform sexual acts on him after he picked her up from school, and that he had sexually assaulted her on several occasions at her great grandmother's house.

Police interviewed Sanders on Jan. 11. He allegedly told police that he had a sexual relationship with the victim for about 6 months, and went on to describe their sexual acts and texting behavior.

Officers then secured a warrant for his arrest and booked him into jail on Sunday.

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Caleb Downs is a crime reporter for mySA.com. Read more of his stories here.| cdowns@mysa.com | Twitter: @calebjdowns