Ambika Chalaune, Mayor of Panchadewal Binayak Municipality, Achham, has been apprehended for her alleged involvement in the murder of Kishor Binod Shahi of the same municipality.
Shahi was found on a cliff near the village at around 10 am on June 4.
The family filed a complaint against 13 persons including the mayor alleging that he had been murdered.
Five persons, whose names were included in the complaint, have already been arrested.
The District Police Office, Achham said that the investigation into the incident has reached the final stage.
Police said that they will submit the report to the court after completing the investigation in a few days.