Considering how close the AFB is, I would assume that they could always call in the military in this instance if access to regular LEO bomb squad equipment wasn’t immediately available... I know they have done that here in Wisconsin last year when there was worries about suspicious devices and a military base was close by.
"Boyd described the Works family as very spiritual. At least one of the girls had recently returned from a church-sponsored mission trip."
Connection to YWAM?