The CBI has arrested former Air Chief SP Tyagi in connection with the Rs 3,600 crore AgustaWestland chopper deal case. A Delhi-based lawyer, Gautam Khaitan and SP Tyagi’s cousin Sanjeev Tyagi alias Julie Tyagi was also arrested along with him. The CBI said that all the three people have been arrested for accepting illegal gratification for exercising influence through corrupt or illegal means.