The man and his three friends took his sister to a secluded place, raped her and strangulated her to death on May 17, when her father lodged a missing person report.
Police on Saturday arrested a man and his three friends for the rape and murder of his ten-year-old mentally challenged sister in Manoharpur in Jaipur.
The brother Zeeshan Ali and his friends Sajid Ali, Amjad Alii and Wajid Ali, who are from Bareli, took her to a secluded place, raped her and strangulated her to death on May 17, when her father lodged a missing person report.
The accused are in the 19 to 21 age group, police said.
On May 21, the father with the help of his son and the three friends found her clothes and slipper in the nearby forest following which police located the body.
Initial investigation revealed that the accused Zeeshan considered her sister, being mentally challenged, a liability as she was unable to do her daily chores and passed stool involuntarily.
Police scanned mobile phones active in the area and investigations narrowed down on the accused. Then police found a witness who had last seen her with Zeeshan. Police interrogation broke them down and they were arrested on Saturday.
Police said it appears the accused had taken her away to murder her and decided to gangrape her there.
Police had assigned investigations to senior officers given the missing person was a minor and mentally challenged girl. Revelation about accused has shocked not only the locals but everyone who has heard about it.