Mission Creep

It appears that the Department of Homeland Security (DHS) has expanded their mission:

A 70 million-year-old Tyrannosaurus Bataar, unearthed in the Gobi Desert, is to be seized by the US Department of Homeland Security.

Unless that Tyrannosaurus Rex skeleton is somehow linked to a terrorist organization I’m at a complete loss on why DHS is the one doing this. Wouldn’t this be something local law enforcement or the Federal Bureau of Investigations (FBI) should be doing?