A man, with four others, has been arrested for allegedly killing her 23-year-old employee for pushing for marriage, police said on Sunday.
The accused have been identified as Anuj, 34, Jai Prakash, 28, Pankaj, 22, Shyam Sunder, 25, and Sumit, 26, they said.
A sixth accused, Sharif, has been missing, police said.
Anuj, the key accused, hatched a conspiracy along with his four others accomplices to kill the woman with whom he reportedly had an extramarital affair, police said.
He hired a contract killer and fixed the deal at Rs 2 lakh, and paid half of the sum in advance.
The victim was his employee and was not aware that the accused was already married, they said.
According to police, they received a call on Saturday around 7 pm telling them that a woman was lying in a pool of blood at an office in Timber market, Kewal Park, of Azadpur.
When police reached the spot they found the woman with her throat slit and blood all around her. She was rushed to hospital where doctors declared her “brought dead.” A senior police officer said that the office was being run in the name of ‘Singh & Brothers Financial Service' allegedly in a tie-up with Bajaj Finance.
The victim was employed as a tele-caller in this office.
A case of murder was registered under section 302 of the Indian Penal Code, the officer said.
A police team analysed the CCTV footage in the locality which showed two men entering the stairway leading to the office at 6.17 pm and coming out after two-three minutes, with one of them carrying a backpack, Deputy Commissioner of Police (Northwest) Usha Rangnani said.
The owner of the office, Anuj, who had last spoken to the woman around 6.18 pm, and claimed to have heard her shrieks on the phone, was also interrogated.
Initially, he feigned ignorance about the possible motive of murder, but later his involvement in the killing was exposed, she said.
When police searched the purse of the deceased, a brand new 'mangal sutra' along with a photograph of Anuj was found.
Anuj eventually broke down and confessed his involvement in the crime, the officer said.
"Anuj stated that he was married and had been in an extra-marital affair with the victim for the last two-three years, and hid from her that he was married.
“Of late, the victim had been pushing him to marry her at the earliest. Fed up with her continuous nagging approach, he decided to bump her off and discussed it with one of his employees, Jai Prakash," the officer said.
According to police, Jai Prakash agreed to the idea and asked for Rs 2 lakh for killing the woman and took Rs 1 lakh in advance. He roped in Pankaj, who in his turn involved the three others for the crime.
The evening before the murder, all five gathered at Pushta road, Sonia Vihar and discussed all the details. They decided to kill the woman in the late evening, when she would be alone in the office just before it was closed, the DCP said.
On the day of murder, Sumit and Sharif came to Azadpur from Sonia Vihar by auto rickshaw. Sharif had a backpack in which he had kept a knife.
Sumit stayed back in the street below, as Shyam and Sharif went on the 3rd floor inside the office.
"They caught hold of the victim when she was talking to Anuj. Calling her around 6.15 pm was part of a well thought conspiracy so that he can have an alibi, and at the same time, be sure that the plan has been executed. The assailants killed her by slitting her throat and fled from the spot," the DCP said.
A sum of Rs 70,000 in cash was recovered from the accused, police said.