when the first sheriff 's dogs had attacked others before mauling devitt .
district attorney spokeswoman jane robison said .
there 's no way i can get the brutality of this out of my head , " devitt 's blood on the muzzle and coats of four of jackson 's eight dogs . "
the officer fired a second shot , and the dog again took off , corina said .
jackson , who authorities say was growing marijuana in his home , was arrested thursday and is being held on $ 1,050,000 bail .
alex donald jackson , 29 , was arrested thursday morning and charged with one count of murder in the fatal mauling of 63 - year - old pamela devitt , who was out for a jog in the mojave desert on may 9 when she was attacked .
acting on information , sheriff ' and animal - control officials obtained a warrant and searched jackson 's home , located about a block from the site of the attack .
when an officer arrived at the scene , one of the dogs was still mauling devitt , according to corina .
on thursday , the los angeles county district attorney 's office charged the dogs ' owner with murder .