What side has this window been broken!

[Carolyn]

Big double glazed window pane ( centre pane). There's a crack from the bottom to the top right in the middle of it, the split in the glass is on the inside I.E. you can feel the sharp glass on the inside but not on the outside, but what are the chances that the window could have been hit from the outside but the glass split on the inside. The reason I ask is my daughter has a stalker, he stands at her windows looking in, bangs on them, has tried to break in with other men and threats to kill among many other nasty things. This crack in the window has appeared suddenly and she has not knocked the window herself or anything. I am going to report this to the police but I know they will say it must have been done from the inside as the crack is on the inside. I need to be certain of this in case he's trying to break in again.