P HOENIX — From heartbreak and devastation to outrage, Emily Pike's tragic death is stirring heavy emotions and spotlighting a crisis that has long plagued Native American communities, where a disproportionate number of people have been killed or have gone missing. In the case of the San Carlos Apache teenager, she disappeared from her group home in a Phoenix suburb in late January. Authorities posted her picture on social media, saying she was missing and had possibly run away. It was nearly a