Excuse me but nobody was cracked on harder than Jordi in this case.
She may have her suspicions or even know who did it - as anyone else there, but:
1) How the fact that she washed her sleeping back right away implicates her guilt in any scenario apart from being directly involved or knowing of a struggle inside the tent? She must knew or be afraid of something that would hint at her or someone she was willing to cover for being on that sleeping bag, right?
2) Does not sending text or trying to make a call while being in the area without cell phone signal is really that suspicious?
Your theory is that Jordi left Maddy there knowing that someone is out to hurt her (or just whitnessed that happening), and cause of that she either went to bang her new bf, then came back for her sleeping bag, made sure to wash it, didn't bother to call or text Maddy knowing that there is no point in doing so anymore?
Or that she left to bang her new bf, learned about Maddy's fate sometime before morning and came back for her sleeping bag, made sure to wash it, didn't bother to call or text Maddy knowing that there is no point in doing so anymore and smoothly went along with covering for someone?
Or that she wasn't involved, didn't knew that Maddy's in danger, came back for her sleeping bag, made sure to wash it, didn't bother to call or text Maddy, later learned that someone she knows mudered Maddy and didn't bother still and right away decided to cover for them?