I don't know the answer to your first question. Based on what I've read, and please forgive me, because I've read so many articles about this case that I can't cite where I got the information, here are the answers or at least legitimate suppositions to your other questions.
2. Where did the abuse of this girl take place?
At least some of them took place when he took Candace out on field service.
3. Was Jonathan Kendrick married when he abused this girl?
He was convicted of molesting his stepdaughter in 1993. I would hope that his wife would've divorced him for that, but I'm uncertain if she did. Within a few years' time, he moved to the North Fremont congregation where he started to molest Candace.
I hope someone with more details responds to this thread, because I'm curious about the details as well.