How do I save Miranda?

Miranda died in my game, how do I save her? Is it possible to do? I don't have any saves older than the one for the mission, am I screwed?

Apparently you have to have gone and met her at the Citadel earlier on, and warned her about Kai Leng (she sent an email way earlier on asking to meet). The reason she is dead is because Kai Leng killed her, although it's not very obvious from the scene - the same thing happened to me and it is far too late to save her now.

To save Miranda, you MUST read the dossier on Kai Leng and meet her via a holochannel from the Specter terminal after the attack on the citadel.

During the mission, she may also die if you do not persuade her father to back down. If that fails, you have to shoot him. If Miranda shoots her father, then she be fatally shot in return and die.