A Des Plaines woman is in jail facing charges in connection with the death of her grandmother.
Lynn Bingaman, 33, is accused of pushing 83-year-old Betty Knaac in her home Monday, causing the elderly woman to be hospitalized. She died three days later after suffering a massive brain bleed.
NBC 5 spoke with Bingaman's mother, Susan Searls, who says her daughter is bipolar and hadn't been taking her medication on the day it happened.
She said Bingaman had "fire in her eyes."
"She got mad at me in the kitchen and started calling me all sorts of names," Searls said.
Searls says that's when Knaac tried to intervene.
"She pushed her out of her way ... there was an accident, and my mother fell and hit her head on the chair."
Bingaman is being treated for her bipolar disorder at Cook County jail, and faces two felony counts of aggravated domestic battery. She's being held on a $500,000 bond.
"It was an accident, there was no malicious intent, and it just happened," Searls said. "This is on Lynne. She's the one that did it."