BUFFALO, N.Y. (AP) —  A 911 dispatcher is on leave and may lose her job after allegedly hanging up on an supermarket employee hiding during this weekend’s shooting rampage in Buffalo, New York.

A spokesperson for the Erie County executive said “termination will be sought” for the dispatcher at a disciplinary hearing later this month.

An employee at the supermarket where 10 Black people were killed by a gunman on Saturday told The Buffalo News that she was whispering during the 911 call because she feared the shooter would hear her.

The employee alleges the dispatcher shouted at her, asked why she was whispering — then hung up.

Payton Gendron, 18, livestreamed the attack from a helmet camera before surrendering to police outside the grocery store. Shortly before the attack last Saturday, he posted hundreds of pages of writings to online discussion groups where he detailed his plans for the assault and his racist motivation.

Investigators have been examining those documents, which included a private diary he kept on the chat platform Discord.

At his initial court appearance last week, Gendron’s court-appointed lawyer entered a plea of “not guilty” on his behalf.

Gendron is scheduled to appear in court Thursday as authorities, including the FBI, continue to investigate the possibility of hate crime and terrorism charges.