Former Survivor producer Bruce Beresford-Redman's mistress will be subpoenaed regarding his late wife Monica Beresford-Redman's murder in Cancun last spring, Breaking Celebrity News has exclusively learned.

Inside sources tell Breaking Celebrity News that Monica's sisters - Jeane and Carla Burgos - are requesting that mistress Joy Pierce be deposed regarding the Mexico slaying.

"The sisters are trying to get Joy served for a videotaped deposition that could be admitted for use in court," the source said.

"They are adamant that both Bruce and Joy know something about what happened to Monica and they just want closure."

As Breaking Celebrity News previously reported, Pierce has been living in a Gardena, California home owned by Bruce, despite reports that their affair ended last year.

"There was someone at the house Joy's been staying at on Wednesday evening attempting to serve her," the source said.

"It's unclear if she was served, but when she is she will have to appear in person to testify as a witness; divulging everything about her relationship with Bruce and what she knew about Monica."

Bruce was arrested Tuesday on suspicion of killing his wife. and during a Federal Court hearing on Wednesday, he was ordered to remain behind bars until his next hearing on November 29th.

The U.S. Attorney has 60 days to file formal ext