(San Mateo, CA) — Convicted killer Scott Peterson is seeking a new trial and if he’s granted one, he can expect his former mistress Amber Frey to take the stand again. Frey was a key witness in Peterson’s trial nearly 20 years ago, in which he was found guilty for the murder of his pregnant wife Laci and their unborn son Conner. Frey testified she didn’t know Peterson was married at the time she dated him. She cooperated with the Modesto police investigation by recording Peterson’s phone calls to her. Peterson is now serving time in San Quentin State Prison. Frey’s attorney Gloria Allred said her client is not looking forward to testifying, but will do so for the cause of justice.