The girl had gone missing a day before and her body was found near a multi-level parking in Chhatikara on Friday morning
According to the police, the accused had befriended the victim on social media and was in a relationship with her for a year, during which he raped her and extracted expensive gifts from her.
News of arrest of the duo on Tuesday night led to violence in their residential area, an officer said, adding that unidentified miscreants damaged some stalls.
The high court on November 6 issued notice to the CBI on Sengar's appeal against his conviction and jail term and had also asked the agency to respond to his application.
Journalist Siddique Kappan was arrested on October 5 while he was on his way to Hathras, home to the young Dalit woman who died after being gang-raped.
"When the woman was unwell, Prajapati under the pretext of curing her through exorcism, took her to a roadside eatery and raped her."
CO Siyaram said the accused also made a video of his act and threatened the girl to make it viral on social media if she dared tell anybody about the incident.
A 29-year-old receptionist at an IT company in Madiwala had alleged that she was raped by her colleague Daniel Patrick after promising to marry her.
According to the victim’s elder brother, the CBI officials questioned him about the claims being made by local residents that he killed his own sister.
It may be recalled that the Lucknow bench of Allahabad High Court had taken a suo-motu cognizance of the case, especially the issue of cremation of the victim girl.
Since colonial era, Dalits in this region were more prosperous than their counterparts in UP
The Supreme Court had recently ordered that security be provided to the victim’s family and witnesses in the case.
The Punjab Police submitted a charge sheet in a court in connection with the alleged rape and murder of a six-year-old Dalit girl in Hoshiarpur.
Those arrested included a Kerala journalist, Siddique Kappan, who has not filed any bail application so far.
The government replaced Latha Jayaraj, who was the special public prosecutor in the initial stage of the case, with Jalaja Madhavan, but it again replaced the latter with the former.