What makes you think the Hidell ID was ever in his wallet?
You may be onto something, Mr I.... I spent some idle time in a hospital waiting room recently, and I had time to review FBI agent James Hosty's book...
Assignment: Oswald Hosty said that the name Hidell was discovered by Warren De Bruey's in New Orleans on Friday night and he relayed that info to headquarters and that's what enabled the FBI to trace the purchase of the Carcano. So apparently the FBI did not know the Hidell name prior to midnight 11/22/63....