The Delhi Police on Wednesday brought back chief minister Arvind Kejriwal's aide Bibhav Kumar from Mumbai. He was taken to Mumbai after the discovery of data from his iPhone, an officer said. 

Kumar is currently in a five-day police custody in connection with the alleged assault on Rajya Sabha MP Swati Maliwal at the Delhi CM's residence. On Tuesday, Kumar was taken to Mumbai for the discovery of data from his phone which he formatted before arrest. The police believe that Kumar may have transferred data to some other person or device in Mumbai. Kumar's phones and laptop, and CCTV recordings from Kejriwal's house have been sent for forensic examination, an officer said.