Shemar Moore's Message Wasn't for Thomas, But Other 'Criminal' Star a Possibility

Most people thought Shemar Moore's cryptic words on karma were all about his ex co-star -- and nemesis -- Thomas Gibson, but Shemar's hinting it WAS aimed at a different "Criminal Minds" actor.

Shemar was out in L.A. when a photog asked if he was reacting to Thomas getting fired from "Criminal Minds" ... since they famously had beef on set. Check out the clip ... Shemar says people got it twisted -- denying he was throwing shade at Gibson.

The other prime suspect is Keith Tisdell -- a former friend and co-star who was recently convicted for stealing $60k from Shemar's charity. He definitely did NOT deny it was Tisdell.

As for his current feelings about Gibson? Shemar was polite, for sure, but still seems kinda icy.

Karma, bro.