A 16-year-old girl was arrested on Wednesday in Haryana for allegedly murdering her mother after she objected to her relationship with an older man from a different caste, police said.
The girl, her boyfriend and another man killed Sheela, 40, on October 25 and buried her body near a drain in Sonipat district's Gohana town, police said.
During interrogation, the girl told the police that she mixed sleeping pills in the milk to make her mother unconscious and took her to a drain on a motorcycle with the help of Surinder and his friend Rinku.
The trio strangled Sheela and buried her there.
Within 10 days of the incident, the girl married Surinder and started living in the same area in Gohana.
However, the girl's maternal uncle brother filed a police compliant after he found his sister missing, Deputy Superintendent of Police Yashpal Singh said.
Police recovered Sheela's body on Wednesday.