When a plant 'whitens' like that, it is *obvious* there has not been anywhere near enough sunlight upon it to keep the chlorophyll 'active'. That tree died from lack of light, no doubt whatsoever, and I'd bet you could rub most of needles off with minimal friction (right??). It *may* green up with some light upon the needles, but grim chances. I'd just toss it as far as you can into the woods around you (or into a nearby Dumpster), and never keep a juniper of any type in less than bright-shade in Deep South States (full-sun further north, of course). Anything less will disappoint you, I promise (and guarantee as well)
Next time you are at any place that sells nursery-sock junipers, feel the soil/media in some of the pots. Bet it is kinda gritty and rather dry-to-touch (usually). I rarely see any junipers within a soil that actually has any 'dirt' within the pot. Sometimes, it seems that they use chunky 'sawdust' or such (what the heck is that stuff?!?). That is what junipers prefer - more dry more often than roots being 'wet' most of the time. Period and 'end of story'