NEW DELHI: A 26-year-old teacher was strangled by her family in Sultanpuri area for daring to marry a man of a so-called lower caste. This shocking case of honour killing comes exactly two years after the Ashok Vihar triple murder, which exposed how girls in the nation's capital are still trapped in dark ages.The Sultanpuri honour killing was hushed up for two months, but the case unfolded after the woman's boyfriend tirelessly pursued the police.The victim, Deepti Chikara , was strangled by her brother while her mother and uncle pinned her down. This, after she walked out of her five-month-old marriage with an engineer and vowed to marry a man of another caste.Deepti was married in January, but returned home within a month of the wedding.Kanjhawala resident Deepti Chikara, 26, had spurned at least three marriage proposals before being forced into a fourth.But her heart lay elsewhere, much to the dislike of her family. Her marriage did not last long as she walked out of it and married a man from a so-called lower caste.Following an argument on the night of April 19, her mother, brother and an uncle strangled her at 9pm, dumped her in a car and carried her body to Roorkee where it was tossed into a canal. Despite Uttarkhand and Delhi Police launching a massive search operations, Deepti's body could not be traced.While the mother Veermati (50), and her son Mohit (22) have been arrested, the uncle Amit is still on the run.Though the family tried to hush up Deepti's disappearance, her boyfriend, a software professional, shot off several emails to the police headquarters asking cops to check on her whereabouts. "When police went to the house on May 23, the family claimed they did not know about her movements. Two days later, they approached the Kanjhawala police station and lodged a missing complaint. Police launched an investigation after family members gave conflicting statements and residents tipped off police about their suspicious movements. The accused were arrested late on Tuesday," said Tajinder Luthra, joint CP (Northern Range).Police said the family dumped the body on April 19 and returned the next morning. When Deepti's father, Karpur Singh was told about the murder, he chose to remain quiet, sources said. Police are undecided whether to arrest him. A police team is camping in Roorkee to trace Deepti's body.