I agree, social media can be really beneficial.
Her mother lives in AZ and is sharing some updates on her FB page but I can't see much more than that. I believe her sister may be as well.
Her husband changed his profile and cover photo on FB yesterday, to a picture of them together and one of the whole family.
I'm such a skeptic that little things irk me and they may mean nothing! But I look anways. So things like her family not "liking" the photo on FB bugs me, even though it's nothing! Like if I saw that they liked the photo, I'd feel more sure that there's nothing hinky going on. admit it, I'm weird and I over-sleuth. Years of skip tracing made me this way.
So here are some scenarios:
She left, premeditated to harm herself.
She left, premeditated to meet someone and was in turn, harmed.
She left to meet someone and with that someone. Ditched the vehicle and phone to look fishy but in reality, she wanted to get away, at least temporarily.
She was randomly attacked while out that day and her vehichle and phone were found as a result.
She was harmed by someone that she knows and her vehicle and phone were planted to stage a part of a potential crime scene.
What else? And where is she?