COLUMBIA, S.C. The South Carolina National Guard has entered the case of a high-school principal charged with hindering the police investigation of a cheerleading coach accused of providing students with beer, according to local news reports.

Principal Jane Blackwell tried to thwart the investigation of Ware Shoals High School cheerleading coach Jill Moore, who was arrested last week and resigned soon after, Police Chief Deputy Mike Frederick said.

Moore was charged with transfer of alcohol to an underage person and contributing to the delinquency of a minor.

The FOX Carolina affiliate reported that sources said Moore was dating a National Guard recruiter and was recruiting cheerleaders to party. In at least one incident, a 16-year-old student had sex and drank alcohol with another National Guardsman.