The blamed in the killing for 23 year-old engineer Anjali Rathour has been captured by Noida Police from Mainpuri in Uttar Pradesh.
Ashwini Yadav, 24 was a school colleague of Ms Anjali and guaranteed to have been relationship with her, police said.
After his arrest last night, he admitted to the killing, they included.
Ms Anjali was discovered dead at the parking lot of her residential complex, Shatabdi Vihar, in Noida on May 31. CCTV film had demonstrated a man pursuing her with a gun.
Yadav said he had executed her as she got into an association with another man and began ignoring him after he lost his job.
As indicated by police, Yadav had met Ms Anjali a day prior to the murder. He had purchased a nation made gun from the place where he grew up of Etawah and arranged the murdering with an assistant.
The following morning he entered the society and called her to the parking area. Detecting inconvenience, Ms Anjali had attempted to run, yet was shot dead.