I worry that a “bad Samaritan” picked her up.
I used to go rescue salamanders and frogs trying to cross the mountain top road during their late February/early March mating season because drivers just blithely smashed them but it only took one creepy guy stopping to “help” to drive it home that I was alone, in the dark and defenseless.
I could have “vanished” here in these mountains and nobody would have ever found my remains.
[and I don’t even live in a “bad area” but that doesn’t mean bad people can’t just happen by, sometimes]
Could be a head injury with amnesia...