CBI's chargesheet on railgate has claimed that there was no move made by the agency to tap prime accused Vijay Singhla's phone since the beginning. But CBI's claim has raised several questions over their probe. Vijay Singhla, nephew of former Railway Minister Pawan Kumar Bansal, allegedly accept bribe from Board member Mahesh Kumar for posting of choice. Bansal had to resign as Union Railway Minister after his nephew and a few other persons were arrested by CBI.