Garnell Whitfield Jr., whose 86-year-old mother died in the Tops supermarket massacre last May, said he’s not interested in hearing what the gunman has to say when he plans to apologize to victims’ families on Wednesday.

“Nothing he’s going to say to me is going to bring my mother back. It’s not going to take away the pain of losing her,” Whitfield, the retired Buffalo fire commissioner, told ABC News. “I’m assuming that whatever he’s doing, he’s doing it for himself.”

Payton Gendron, the 19-year-old gunman who killed 10 people on May 14, is set to be sentenced in Erie County Court in Buffalo to life in prison without the possibility of parole. He pleaded guilty in November to 15 charges, including murder and attempted murder. He is the first person in state history to be charged with domestic terrorism motivated by hate. He has pleaded guilty.