A teenage student was murdered by her father to silence her claims that he sexually abused her, a court has heard.
Bernadette Walker, 17, was last seen when Scott Walker, 51, picked her up from his parents' Peterborough home, jurors heard. He denies her murder.
Prosecutors allege he and and her mother Sarah Walker, 38, then formed an "unholy alliance" to cover up her death. Her body has never been found.
Both deny perverting the course of justice.
Prosecutor Lisa Wilding QC told Cambridge Crown Court that on 16 July Bernadette, also known as Bea, told her mother her father "had been sexually abusing her over a number of years".
"Sarah Walker told Bernadette that she did not believe her," said Ms Wilding.
"The following day, it was decided that Bernadette should go and spend the night with her paternal grandparents while things calmed down a little."
Bernadette's father collected her from her grandparents' house the following morning, prosecutors allege.
"Since the day she disappeared she has not used or sought to access her telephone or social media accounts, she has had access to no money or banking and has not been seen at any hospital or other surgery," said Ms Wilding.
"No-one who knew her or loved her has heard from her since that day."
Ms Wilding said Bernadette was "presumed dead", adding: "The prosecution allege that Scott Walker killed Bea to prevent her pursuing her allegations of sexual abuse any further."
She said Mr Walker's phone was off between 11:23 BST and 12:54 on 18 July and "the prosecution say that in that hour and a half he killed Bea".
Dad killed daughter to end abuse claims, court told - BBC News