Amber Frey is an American author and public figure who gained prominence for her involvement in the high-profile murder case of Laci Peterson. Frey, who had a relationship with Peterson's husband, Scott Peterson, during the time of Laci's disappearance, became a key witness in the trial. Her experiences were later detailed in her memoir, "Witness for the Defense," which provided a personal account of the case and its impact on her life. Frey's story brought significant media attention and public interest.