The only mention I can find anywhere of someone claiming to put the chicken bones back in the bag is from BRW's WC testimony:
Mr. BALL. Where did you put the bones?
Mr. WILLIAMS. I don't remember exactly, but I think I put some of them back in the sack. Just as I was ready to go I threw the sack down.
Mr. BALL. What did you do with the sack?
Mr. WILLIAMS. I think I just dropped it there.
Mr. BALL. Anywhere near the two-wheeler?
Mr. WILLIAMS. I think it was.
Mr. BALL. What did you do with the Dr. Pepper bottle?
Mr. WILLIAMS. Just set it down on the floor.
According to Williams the bones were put back in the bag and dumped by the two-wheeler truck. He also laid the Dr Pepper bottle on the floor by the truck. This is exactly what we see in the crime scene photos taken by Day and Studebaker. So we have eye-witness testimony by the person who had the lunch confirmed by photos of the crime scene before anything was moved.
All neat and tidy 
Gerry Hill.
Mr. HILL. We hadn't been there but a minute until someone yelled, "Here it is," or words to that effect.
I moved over and found they had found an area where the boxes had been stacked in sort of a triangle shape with three sides over near the window.
Mr. BELIN. What did you see over there?
Mr. HILL. There was the boxes. The boxes were stacked in sort of a three-sided shield.
That would have concealed from general view, unless somebody specifically walked up and looked over them, anyone who was in a sitting or crouched position between them and the window. In front of this window and to the left or east corner of the window, there were two boxes, cardboard boxes that had the words "Roller books," on them.
On top of the larger stack of boxes that would have been used for concealment, there was a chicken leg bone and a paper sack which appeared to have been about the size normally used for a lunch sack. I wouldn't know what the sizes were. It was a sack, I would say extended, it would probably be 12 inches high, 10 inches long, and about 4 inches thick.
At this point, I asked the deputy sheriff to guard the scene, not to let anybody touch anything, and I went over still further west to another window about the middle of the building on the south side and yelled down to the street for them to send us the crime lab.
Not knowing or not getting any indication from the street that they heard me, I asked the deputies again to guard the scene and I would go down and make sure that the crime lab was en route.
When I got toward the back, at this time I heard the freight elevator moving, and I went back to the back of the building to either catch the freight elevator or the stairs, and Captain Fritz and his men were coming up on the elevator.
I told him what we found and pointed out the general area, pointed out the deputies to them, and told him also that I was going to make sure the crime lab was en route.
About the time I got to the street, Lieutenant Day from the crime lab was arriving and walking up toward the front door. I told him that the area we had found where the shots were fired from was on the sixth floor on the southeast corner, and that they were guarding the scene so nobody would touch anything until he got there. And he said, "All right."
JIM EWELL, NEWS REPORTER from "No More Silence".
I had been a newspaper reporter for about fifteen years, and I thought that I was a seasoned professional. But now that the weight of this was coming down on me, I was beginning to get woozy. I felt light headed. But I do remember standing there with the police not knowing if they still had somebody trapped upstairs, or if there was going to be an outbreak of gunfire if they exposed somebody. And again, we didn't know how badly hurt Kennedy was, at least I didn't.
Meanwhile Jerry Hill worked his way up to the sixth floor, leaned out an open window, and he had what was thought to be Oswald's little fried chicken lunch. It in a little pop box. Jerry was holding that box and holding up one of the chicken bones exclaiming to everybody that listened to him down on the street that the fried chicken what he had been eating. About that time there was a commotion around one of the squad cars, and we could hear a radio saying that an officer
had been shot in Oak Cliff.
Carl Day eventually admitted in his WC testimony that he did not find out about the ownership of the lunch until more than 2 days later.
Mr. McCLOY. On the crime scene, that is, on the sixth floor, did you notice any chicken bones or chicken remnants of a chicken sandwich or lunch or the whereabouts, if you did see them?
Mr. DAY. Yes, sir; there was a sack of some chicken bones and a bottle brought into the identification bureau. I think I still have that sack and bottle down there. The chicken bones, I finally threw them away that laid around there. In my talking to the men who were working on that floor, November 25, they stated, one of them stated, he had eaten lunch over there. Mr. McCLOY. Someone other than Oswald?
Mr. DAY. Yes, sir; so I discarded it, or disconnected it with being with Oswald. Incidentally, Oswald's fingerprints were not on the bottle. I checked that.
Day never saw the lunch remnants in the TSBD on the 22nd. By the time he returned to the TSBD they were removed by Johnson. No doubt by that time the lunch was nothing more than a curiosity.Oswald was dead and Williams occupation in the SN was confused by the placement of the lunch remnants in the bag and set down outside the boxes, likely by Hill and or Johnson.
The management of the crime scene was shambolic.
