A man has been sentenced to 99 years in prison for taking part in a repeated group sexual assault of an eleven-year-old girl in the U.S. state of Texas.

Jurors of Liberty County in Cleveland unanimously agreed to a guilty verdict for 20-year-old Eric McGowen Monday after only 30 minutes of deliberation.

The girl was gang-raped by 20 men and boys ranging in age 14 to 27 on at least five occasions for three months from September 2010. Some of the assaulters made videos and took photos with their cell phones.