The Central Bureau of Investigation (CBI) has registered an FIR against an Enforcement Directorate (ED) assistant director who escaped during a trap operation last week. The ED officer, posted in Shimla, is accused of demanding bribes from promoters of educational institutes in Himachal Pradesh. The CBI has already arrested the officer's brother and a middleman in connection with the case. The ED officer and his supervisory officers have been transferred to Delhi.