They must be looking for the helmet he wore against the Niners in the conference championship. If there was no grass or dirt, it's obviously fake.
When this is over I for one will be shocked to learn that the NFL and the teams get money from this and that the controls around chain of custody for these items are non existent.
Blaming the players for that - unless they are specifically contractually liable - is as lame as it is expected.
"Sir, I was wondering: did you happen to catch the professional football contest on television last night?"
"Oh it was most exhilarating: the Giants of NY took on the Packers of Green Bay and in the end the Giants triumphed by kicking an oblong ball made of pigskin through a big H. It was a most ripping victory."