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Crystal was last seen in Lafayette, Louisiana on February 7, 2013. She was living in a shelter for abused women at the time. She left the shelter on February 7 and was last seen the following day. She failed to attend several child custory court dates later that month. She was reported missing on February 18. Sean Grebinger, her estranged husband, disappeared at around the same time.
Crystal and Sean married in the 1990s and lived in Breaux Ridge, Louisiana. They had a stormy relationship. In November 2012, Crystal had filed for a protective order to keep Sean away from her and their four children; she wrote that her husband had sexually assaulted her and on one occasion tried to strangle her, and she was afraid for her and her children's lives. An order was issued for Sean to stay 300 feet from Crystal at all times, but Sean allegedly violated it twice. On January 14, Crystal filed for divorce.
Authorities haven't named Sean as a suspect or person of interest in Crystal's disappearance, but they would like to speak to him. They haven't said whether they believe she met with foul play, but her family believes she wouldn't have willingly abandoned her children. Her case opened 2018 by Psychic Brian Ladd.