Delhi Police said on Wednesday they have arrested the wife of Rohit Shekhar Tiwari, the son of former Uttar Pradesh chief minister ND Tiwari, in connection with his murder.

Shekhar was found dead last Tuesday and the report of an autopsy last Friday said that there were signs that he died of “asphyxiation due to ante-mortem strangulation and smothering” prompting the police to start a murder investigation.

Shekhar’s wife Apoorva and his half-brother Siddharth were at home, along with the three servants, at the time of his death.

Police had questioned the five people and said they did not suspect the role of an outsider. “His wife has been arrested today morning by the crime branch,” a spokesperson of Delhi Police said.

A lawyer by profession, Rohit Shekhar, had worked as an advisor to the former Uttar Pradesh Chief Minister Akhilesh Yadav from 2015 to 2017 following which he stayed with ND Tiwari, his biological father, until the latter’s death in October last year.

Rohit Shekhar is survived by his mother, Ujjwala and wife. ND Tiwari had not married Rohit Shekhar’s mother before his birth. In 2012, he filed paternity suit claiming ND Tiwari to be his biological father. A DNA test confirmed his claim and in 2014, ND Tiwari married Ujjwala.