A former school employee Tuesday accused Arkansas High School Principal Robin Stover of tolerating racism and announced a petition drive seeking her removal.

But school officials say they have investigated complaints about Stover and determined accusations of racial divisiveness to be unfounded. Other employees defended Stover.

Kimberly Blair, a former substitute teacher, told school board members she believes Stover tolerates, encourages and promotes racial division. That belief is reflected in a petition she is circulating among district patrons that calls for Sto...