1) arrest is being done in order to pressurise boy to surrender
2)since police complaint has been lodged by the girl parents against the boy relatives for being hand in glove and having hand in abduction of the girl police must have arrested the relatives .
3) contact a local lawyer and apply for bail of the relatives who have been wrongly arrested .
4) if the girl is over 18 years old she is free to marry any boy she wants without her parents consent
5) the testimony of girl would be crucial in this case . if girl says she eloped out of her own free will no case would be maintainable against the boy or his relatives