After three days of interrogation, Apoorva Shukla Tiwari, the wife of Rohit Shekhar Tiwari, was arrested by the Delhi Police Crime Branch on Wednesday for hatching a conspiracy to murder him. Police sources said that Apoorva herself smothered Rohit to death when he was inebriated. She didn't take anybody's help to commit the crime. Rohit was found dead under mysterious circumstances in his New Delhi residence in the evening of April 16.