and it was strange enough to be alarming. >> so they feared for bella and katie's safety. >> did you think they were in danger too? >> if he's in a place where he could do this, co-bring harm to those kids? the answer to that was absolutely. >> you have a million conversations. is this the right thing? are we sure this happened? at the end of the day you have to live with the fact that if we're wrong and this is way over the line, we did it for the right reasons. >> there was an emergency hearing. and the judge determined that the intense scrutiny brad was likely to face during a murder investigation put the children at risk. in late july 2008 the girls went back to canada to live with krista, their slain mother's twin, and her husband. >> kind of in a hurry. >> but brad, remember, had not been charged with any crime. wasn't even a declared suspect. and he fought hard to get his daughters back. >> afterwards i thought about it -- >> which meant three months after nancy's murder, sitting for a videotaped deposition in