Can any one tell me who Mahatma Gandhi is? Is there a dark side of him?

he was a major political and spiritual leader of india, he believed in peaceful protest. there is a dark side of him. i heard that he let his wife die becuase he didnt believe in her taking antibiotics. then later on in his life he became ill and the only way to live was to take antibiotics, and what does he do... he takes them and lives