In a gruesome double murder last week, Rakesh Jolly had stormed the house of his partner in Sector 39 and killed his wife and younger son.
He had also stabbed his partner, his elder son and house help, they said.
Jolly, who had suffered severe head injuries in the incident, was admitted to a hospital where he breathed his last yesterday, SP City Dinesh Yadav said.
None of the family members of Jolly had visited him in the hospital, he said.
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