Harlingen police arrested 44-year-old Domingo Cody Serna on Friday.
Investigators told Action 4 News that Serna is accused of a sexually abusing a 15-year-old girl.
The girl told investigators that Serna had been sexually abusing her since she was 12 years old.
Police said the girl made an outcry to her mother on January 25th prompting a criminal investigation.
Detectives arrested Serna on a first-degree felony aggravated sexual assault of a child charge.
Action 4 News does not identify victims of sexual abuse but investigators confirmed that Serna had access to the girl through her family and that Child Protective Services has been notified about the investigation.
Serna remains in custody at the Cameron County Jail under a $500,000 dollar bond.