Delhi Police on Wednesday arrested Rohit Shekhar Tiwari's lawyer wife Apoorva on charges of his murder, citing a "turbulent and unhappy" marriage as the motive, a senior police official said. 
Rohit Shekhar, the son of the late veteran politician N D Tiwari, was smothered to death on the intervening night of April 15 and 16, an autopsy report said.

"On the night of the incident, the couple had a fight over a relative. Rohit had been drinking all the way from Uttarakhand to Delhi and was not in a condition to resist. During the fight, she pounced on him and smothered him," Rajeev Ranjan, additional commissioner (Crime), told reporters.