In 2002 Coy went on trial for performing oral sex on his daughter's nine-year-old friend while she slept at his house one night in September 2001. Claims that Coy had engaged in sexual activities with other underage girls, a total of 7 excluding his accuser, quickly arose after his September 25, 2001 arrest.
A Houston jury convicted Coy of aggravated sexual assault of a child on May 18, 2002. Coy was sentenced to 45 years in prison and ordered to pay a $10,000 fine. Carlos Coy is currently incarcerated within the Texas Department of Criminal Justice. Despite the nature of his crime, there are still persistent messages from online commenters and graffiti writers calling for his exoneration.