It sounds like the queen got killed in the process of moving the hive.  If
you marked the queen it should be easy to tell.  If they were able to
replace the queen themselves, the new queen should be laying in about a
week (12 -14 days for the queen cell to emerge and 7-10 days for the queen
to mate and start laying).  I would recommend requeening the hive, since it
is so aggressive.  I would also recommend using a smoker at all times, it
your control over the bees.  If you don't need it that's great but always
have it on hand lit and ready to go just in case.
 
Garrett