"It's not my fault" or " If not I'll help"?

[Yukitora]

Referring to the English in the song GUILTY (which I've really started to digg), what do you think it's saying after "guilty, or not guilty"?

At first I thought it was "it's my my fault", but i also heard people hearing "if not i'll help", which kinda makes more sense... what do you think?

ps. sorry if this has already been discussed, but there isnt a thread about it in the enquiries yet...