Gurgaon: A Gurgaon couple in their home before their 7-year-old son was stabbed to death, police said. The person was detained, believed to be the assassin. The incident took place late Thursday in Dundehera, according to police. The victims, Vikram Singh, 31, lived together with his spouse and son in a leased apartment. The accused Abhinav was  Vikram Singh's  friend. "Vikram had taken Rs. 1.5 lakh from Abhinav to aid him get a job abroad, however, the arrangement did not work out. They had heated arguments on Thursday, which then led to a major fight between the two.  "Abhinav suddenly got up and stabbed Vikram and then his wife Jyoti, who tried to intervene," said police officials.