Yes. And uber lightened hair has very little pigmentation left and is very porous.
So, while the color put over bleached hair will initially "grab" even more than "virgin" hair, the porosity also enables the color to wash out more rapidly, even with a permanent color.
And Jodi may have even used a semi- or demi- permanent color on her hair (which would be less damaging, but also more prone to fading).
Like I said earlier, the rental guy didn't say her hair was platinum blonde, he said blonde. If the color she put in even a week or two prior had begun to fade out, she could have been more of a light golden brown/blonde shade, and with her coloring, it wouldn't be hard to imagine someone noting her as a "blonde Latina girl".
Again, just saying it's possible. She could then have reapplied color prior to arriving in Mesa, but again, it could just be the lighting making it look darker. I think her mugshots show it as a light red/gold brown, IMHO.