Grief chased her and used his fingers to gouge her eyes out with such force that her eyeballs ruptured, the news station reported. She underwent surgery to save her vision but doctors gave her less than 1 percent chance of regaining her sight.
Suffolk County District Attorney Timothy Sini, who described the case as “extremely disturbing,” said Grief appeared dismissive of the damage he had caused.
"When (Grief) was talking to police and was told he had gouged his grandmother's eyes out, he was very dismissive," Sini said in a statement. "He said, 'So?' shrugged his shoulders and appeared to be apathetic toward the situation."
Before his death, Grief was facing up to 25 years in prison, NBC New York reported.