NYC murder-suicide victim begged neighbor for help with daughter ‘fighting demons’: ‘Telling her to do bad things’

A Park Slope mom killed by her daughter in a grisly slay-suicide had been terrified of the younger woman, who was “fighting demons’’ and toted around a knife in her pocket, a close neighbor said Sunday. Deshawn Jackson said the tragic 59-year-old mother, a vegan chef who law-enforcement sources identified as Olga Bracero, would desperately call…