Haha no I don't work for the KGB! I genuinely got all that information from someone else!
The first link I posted up there is actually quite an interesting insight into Angel's character.
And it does seem she was adopted as an adult if what I've read is true. This is an article which shows that the McKenzie guy adopted her:
http://www.thisiscroydontoday.co.uk/...l/article.html
Again... I didn't find this article myself! I do seem like Angel's stalker though...