I read an article that said she had defensive wounds, "body was found guarded by “two very large, brindle-colored pitbull dogs" "Stephens had defensive wounds on her hands and arms. But the first traumatic injury she suffered was to her throat and face," and "it took at least eight hours for investigators to collect over 60 pieces of evidence" (or in other words she was shredded to pieces by the two dogs).
Of course, it could have been a Bigfoot attack and the dogs were preventing it from coming back... 
It wouldn't matter if the bite wounds match that of the dogs mouths.
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Joe
See Porsche run. Run, Porsche, Run:
`87 911 Carrera