Possible legal action in the Kimo "death" rumor

In the wake of "Death/rumor-gate" (there really isn't anything more fun then making up a "gate" controversy) Kimo Leopoldo's legal team may be preparing to take legal action against the source of the rumor, 

Brandt Stebbins, Leopoldo's manager, denied that anyone associated with the fighter was part of the initial report.

"Plain and simple, you can go to mixedmartialarts.com and see all the posts," Stebbins said. "You can see the posts from the original people and the original guy who started it. That gentleman was banned (from the site). We're trying to summons his name so we can sue him. We're not taking this lightly."

Stebbins did not clarify under what pretense the forum member would be sued, though the camp would likely need to prove he or she knowingly posted incorrect information.    

Libel and defamation seem to be the obvious contenders for legal charges.