I just wanted to bring this forward from the helpful timeline back a few pages.
4/6/2020 The last time Danielle Tyler is heard from. She texts her grandmother “MeMaw, I think I am going to turn my phone off for a little bit. I’m not sure, I am just tired of all the drama.”
That sounds like DT was definitely planning on going underground for at least a little while. She let's her grandma know that her phone will be off so that she doesn't worry if she tries to contact her - however, phone off = can't be traced. Killing two birds with one stone so to speak.
Whatever happened after that is anyone's guess and the fact the homicide detectives asked her Grandma to report her missing is highly alarming.