Tonks/Kingsley
Remus has told you what he saw? Ask your mum to file a missing person report - but don't let her mention what Remus has said. If she even knows. The less they think we know the better, and I don't want to put Remus at risk.
Don't think like that. If you were there, you would likely be missing as well. I'm sure both your parents were glad you were at the concert.