ITA. I am a mother of two college aged daughters. I am also hyper vigilant. My daughters 21 and 23, find my safety admonitions annoying. If they had received a text from a friend who said they were lost, and they were drinking, they would not get in a car to go get them. In their limited scope, they would probably figure their friend would get there sooner than later. Suspecting or thinking the worst is not their thinking. Their frame of reference is small world. Bad things that happen are rare. As adults and parents, we know differently. We cannot assign our logical thinking to theirs.
I do not fault her friends at all. I am glad though that someone noticed her missing and notified her parents. I pray they can find evidence that leads to her recovery. As a parent, my heart goes out to her parents as they must be worried sick. Suspecting "foul play" and knowing it with certainty are two different things. JMV