For 14 days a month over the course of seven years, the Polk County Sheriff’s Office said, a Florida Polytechnic University police officer and retired Nashville cop repeatedly sexually assaulted a female relative.The Sheriff’s Office Thursday arrested Winfred Carl Stocks, 57, of Auburndale, on charges of sexual battery, extortion, and aggravated stalking of a family member.Stocks has been a police officer at Florida Poly for about two years, the Sheriff’s Office said. He resigned from his job with the college upon his arrest. Before that assignment he retired from the Nashville Metro Police Department in 2011 after 17 years of service."Carl Stocks betrayed this woman and he betrayed his oath as a police officer to protect people,” Sheriff Grady Judd said in a statement. “He systematically controlled the victim by maliciously stalking, threatening, and both verbally and physically controlling her for sex."According to the Sheriff’s Office, a woman contacted deputies Wednesday to report more than six years of sexual abuse. She told deputies the abuse began even before Stocks moved to Polk County in 2012, but intensified when he did move there and has continued since.Deputies said the woman presented them with hundreds of text messages he sent over the last six months that included nude images of her he took without her knowledge from closed circuit cameras installed in a home. Deputies said Stocks even sent nearly 100 texts in one day.According to an arrest report, Stocks’ abuse escalated from inappropriate and unwanted contact to sexual battery. Stocks threatened the woman with physical violence, death and said he would send the nude photos to others.The woman told deputies she had been afraid for her safety since September, but did not want to cause added stress for her family and feared further retaliation since Stocks had control over her bank accounts and is the owner of her vehicle.The woman’s name and her relationship to Stocks was not disclosed by the Sheriff’s Office.Stocks is currently being held in Polk County jail.Contact Daniel Figueroa IV at [email protected] Follow @danuscripts.