Police said today that the arrested accused, all in their mid 20s, were identified as Rahul, Karamjeet, Sandeep and Amarjeet. All the four were putting up in an area located close to the village where the victims live.
While two of the accused work at a private warehouse as office helpers, two others are farmers.
Police said one of the victims who was assaulted by the four had spotted the four accused near the Kundli-Manesar- Palwal Expressway, which lies close to the victims' Dingerheri village in Mewat district, many times in the days before the crime.
After the incident, police had released sketches of the accused on the basis of description given by the survivors.
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On the fateful night, the assailants had first killed the couple with sharp edged weapons and then injured six other members of the family, all of whom were sleeping in the house, located near the fields in the village.
They had also ransacked the house, an isolated structure located in the middle of farmland, and fled with some valuables including cash.
Among the injured were two women, aged 18 and 22 years, who were sexually assaulted by the assailants. They were relatives of the couple, according to police.