Conrad Murray will plead the Fifth at Michael Jackson's wrongful death lawsuit trial.

Although the shamed doctor has been called to take the stand at Michael's mother Katherine's civil case against AEG Live - which accuses the company of being responsible for negligently hiring Conrad to care for Michael - he will not answer questions because the responses could affect his appeal, according to TMZ.

The medic has already served a year and a half in prison after being found guilty of involuntary manslaughter following Michael's death, but his lawyer Valerie Wass is set to file documents arguing she is appealing his conviction and whatever he says in Katherine's lawsuit could be used against him.

Michael's son, Prince Michael, is expected to give evidence on conversations he had with his father about the concert promoter. "Prince absolutely plans on testifying," a source previously said.