Conrad Murray went from being a star prisoner to a star witness at the L.A. County Jail today. TMZ.com has learned a "FIGHT" broke out between his lawyers during a jailhouse visit.

Sources close to Murray say that Murray had been complaining about pain in his right arm and shoulder for the past few days. Tuesday, two of his attorneys (who are each working on different cases) raced down to the jail to check in on him when ALL heck broke lose.