Gerald Hill.
Sergeant Gerald Hill, spoke to the press shortly after Oswald’s arrest and supplied incriminating details, yet not once mentioned the Alek HIdell ID. And they allegedly found his billfold containing this important bit of evidence! Now Gerald Hill could have forgotten to mention this, but when he is interviewed for a second time as mentioned In the supplementary volumes of the Warren Report, Hill states to the newsmen, “The only way we found out what his name was, was to remove his billfold and check it ourselves; he wouldn’t even tell us what his name was.” Later in the interview a reporter asks, “What was the name on the billfold?” Hill replies, “Lee H. Oswald, 0-S-W-A-L-D.”
No mention at all of the name Hidell.
Gerald Hill in a filmed interview (at 03:44) also stated that they turned Oswald over to Captain Fritz of the Homicide Bureau.
From the AARC website