Mariposa woman pretended to have cancer for years in donation scam, sheriff says BY LARRY VALENZUELA JULY 17, 2020 09:08 PM , MARIPOSA COUNTY SHERIFF'S OFFICE A woman who orchestrated a cancer scam that victimized dozens of Central California families is in custody after six years. Kellie Walker, now 28, began faking back in 2014 that she had stage two ovarian cancer, according to the Mariposa County Sheriff’s Office. Friends and family of Walker set up a bank account at a local bank branch, and a fundraising dinner was held in order to help Walker and her family deal with...