if it was in the unsecured area, take it home
if it was in the secured area....safe it, then call security
let me share a scary
back in the mid 90's at one of my navy commands
we were transitioning from 45s to the Beretta 9mm
fedex delivered a mid sized package on a saturday afternoon to our duty office desk
the guy on duty was not required to sign for it.
he put it in a pile for monday to be delivered to the respective work center
monday early i come in to work and see the box for my office (quality assurance)
so i carry it to the office and sat it on the floor until the morning meetings were done.
so around lunch time
i opened the box.
wholly cow batman
it had 24 brand new berettas and 48 extra clips, plus new combat holtsters
all the serial number paper work, fired bullet casings the whole ball of wax
we had no idea they were coming, no tracer number...nada zip from the naval weapons center in VA, from whence they came.
thank goodness we were honest, or 24 new pistols would have been going home with a few of us in the office
what made it worse, was we called the weapons depot to inquire about new weapons shipment and arrival..they had no record of shipping or even when we would get the new ones....
i went and requested the commanding officer to come down and see our predicament...he freaked and ordered us to lock em up in our secure locker after prepared them for a live fire exercise the next day at the base range
after wards they stayed in our secure weapons locker, and about once a month we had training day at the range.
a few months later we received our expected shipment of 120 9mms through secure delivery
when i left in 2000 they were still part of our squadrons morale and welfare kit.
so DHS or any other gov agency misplacing firearms is totally plausible