The five men arrested in connection with the killing of 23-year-old Nikki Yadav had planned to get rid of her so that Sahil Gehlot could marry a second time to a woman of the family's choosing, police said on Saturday. During interrogation, it was revealed that Gehlot's family was very much aware of his marriage to Yadav but they were against it, the police said. Police arrested five people -- Gehlot's father, his two cousins, and two friends -- late Friday night in connection with the killing. One of the cousins is a Delhi Police constable. Gehlot was arrested earlier.