Authorities suspect Carl Grillmair was shot by man arrested for carjacking, as friends mourn him as ‘irreplaceable’ Authorities suspect Carl Grillmair was shot by man arrested for carjacking, as friends mourn him as ‘irreplaceable’ A renowned California Institute of Technology (Caltech) scientist who studied distant planets and other areas of astronomy for decades was recently shot to death at his home in a rural community outside Los Angeles , authorities said. Carl Grillmair, 67, died from a