Three Chapel Hill schools, including Chapel Hill High School, will have extra security on Tuesday, April 10, 2018. .
Three Chapel Hill schools, including Chapel Hill High School, will have extra security on Tuesday, April 10, 2018. . Tammy Grubb File photo
Three Chapel Hill schools, including Chapel Hill High School, will have extra security on Tuesday, April 10, 2018. . Tammy Grubb File photo