"The third accused Udeyveer was arrested last night and will be produced before court," a senior police officer said today.
He said the initial medical report of the murdered woman did not confirm rape and the police was awaiting the final report.
"Her body, however, showed signs that a rape attempt was made," the officer said.
The semi-nude body of the woman bearing injury marks was found on Saturday morning from Pushta area in Sector 63.
Sub Inspector Rajesh and constable Rakesh, who had allegedly failed to act on the complaint of the victim two years ago that one of the accused had forcibly entered her house and attempted to molest her, have been sent to police lines.
"Had the police taken action then the accused could not have dare to commit the murder.The police slackness gave the accused courage to strike against her," National Commission for Scheduled Caste Vice Chairman Raj Kumar Verka had stated during his visit to Noida on Sunday.
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Yesterday, the two arrested accused Naresh and Kailash were sent to 14 days judicial custody after they were produced before the district court.
Call details and electronic surveillance helped the police in nabbing the culprits.
Naresh had once worked in the same garment export house where the victim was working and had promised to marry her. However, the woman came to know that he was already married and started avoiding him.
Naresh told police that the woman was threatening to lodge an FIR against him and he got scared and hatched a plan to kill her.
On the fateful day, he took her to an under construction factory at sector 63 where two other accomplices Kaliash and Udaiveer were present.
Kailash and Udeyveer also had enmity with the woman. The victim had in the past complained to police against Kailash. Udeyveer had few years ago forcibly entered her house and molested her.
Four policemen were on Sunday suspended and the SHO was shunted to police line in the wake of the incident.
Though the district administration and state government had announced financial compensation, he victim's father had initially refused to accept the compensation, saying he only wanted to see that his daughter gets justice.
He said her soul will rest in peace only when her killers were hanged. Later on persuasion of officers, a compensation of Rs.3.75 lakh has been given to him.
The Chief Minister's Rs.15 lakh compensation announcement was yet to be communicated to the district office. "Once received, this amount too would be disbursed to the family," officials said.
After the incident, police has set up police chowki at Behlolpur Hindon Pushta area. Behlolpur and Chotpur Colony are included under it.As these colonies are in remote area, their monitoring from Model Town chowki was difficult.