NEW DELHI: An accountant employed in a private firm in central Delhi was abducted and murdered by his girlfriend after he threatened to punish her for having an affair with her employer. Police said on Saturday that the woman slipped sleeping pills in the man’s cold drink and then dumped his unconscious body into the Yamuna near Mathura with the help of a friend.Mandeep Singh Randhawa, DCP (Central), said that police first learnt of Sushil Kumar’s disappearance when his father, Rishi Pal, filed a missing person complaint at the Hauz Qazi police station on August 12. The father informed the cops that Kumar had left office but went missing on the way home.“The investigating team found that a large number of text messages were being sent from Sushil’s mobile phone to a woman. His father also disclosed that his son was in a relationship with the woman, Dolly Chaudhary,” said Randhawa.Chaudhary was summoned and during questioning, she broke down and admitted to drugging Kumar and consigning his body into the river with the help of friend Manish. At her instance, Manish was arrested from Mathura. Police recovered the gold ring and a bag belonging to Kumar from him.The woman admitted to the cops that she had been in a relationship with Kumar for the past six years. But Dolly, who was also pursuing her graduation degree course from a UP university, had recently met Mohit Mavi, who employed her in his firm in Greater Noida. The two grew close, she said, and she started staying with Mavi in an apartment near the office.Mavi’s wife learnt about her husband’s affair and reportedly committed suicide. Mavi fled to Bengaluru to avoid police questioning. Meanwhile, Kumar discovered that his girlfriend was having an affair with Mavi and threatened to upload her intimate photos on social media sites.On August 11, Chaudhary said she would explain herself and invited Kumar to Mathura. They went to a hotel, and when he went to wash his hands, the woman spiked his cold drink with some sleeping pills. Kumar, she confessed, fell unconscious and she called Manish to help her carry the man to the river. The duo apparently lugged the body to the Yamuna on a Scooty and dumped it in the waters. She went to her home village the following day.