A Question

[ladyzenobia.livejournal.com]

Hello! I'm not sure if this is the right place to post this, but since I came across the topic here, I thought it would be appropriate.

I was reading oryx_leucoryx's wonderful GoF chapter commentary and it was mentioned that Bellatrix/the Lestranges managed to talk their way out of Azkaban before attacking the Longbottoms. This is actually something I've come across before on various forums and when reading theories, but I can't find anything about it in the books. I tried looking for old interviews and it isn't mentioned there either as far as I can tell. So I was just wandering, how do you know this? I'd be very grateful if someone gave me a quote or something :)

Also, this is my first post here, so I'm sorry if I've made some grave error.