A Waco man accused of molesting an underage girl over a period of years has been sentenced to 12 years in state prison Tuesday. 

The case against Mario Olvera-Vasquez began in 2013 when the victim made an outcry and police were called. 

The incidents went back to 2003, occurring in an east Waco home. 

Part of the case was developed through the use of forensic interviews with the victim conducted by the advocacy center. 

Police made the arrest in 2015.