Joe Jackson screwed up by filing a Michael Jackson wrongful death lawsuit against AEG ... a judge has just ruled.
Joe filed his wrongful death lawsuit AFTER Katherine Jackson filed hers -- on her own behalf and on behalf of the kids.
It's unclear why Joe didn't try to join in Katherine's suit rather than filing a separate one on his own. It's possible Katherine didn't want him.
Whatever the reason, the judge said you can't have 2 suits that allege the exact same thing, and since Katherine filed first Joe loses.
Joe could now try to horn in on Katherine's legal action -- if she'll let him.