What is the legal ruling regarding the marriage of a man who kidnapped a girl with her consent, knowing she was engaged to his cousin, and then took her to the police station and married her after obtaining her father's authorization? And what is the religiously prescribed action required from the girl's family?

The abduction of girls or being alone with them in seclusion (khalwa) is a great evil that must be denounced. The girl's family must report the matter to the competent authorities for appropriate action. As for the marriage contract (nikah) for an abducted girl with someone other than her abductor, provided it is done with the consent of her guardian (wali), the contract is valid.