Ramawtar and his family initially demanded a dowry of Rs 5 lakh from the family of a girl, who are residents of Amabari village here, they said.
Before the scheduled wedding, the girl's family gave Rs 1 lakh cash and two cheques of Rs 1 lakh, SHO Vinod Kumar said.
He said Ramawtar's family later demanded an additional amount of Rs 10 lakh as dowry, which the girl's family refused.
The accused family, from Pithanpur village in Aligarh district, then withdrew Rs 2 lakh that was given in cheque and refused to return the amount, police said.