Unable to delete Premiere Pro Preview folder and causing iMac to be restarted

In an attempt to clear space of my iMac i was deleting some old .prv files and found that the files for one project would not delete. I would put them into the trash and then attempt to empty it but by doing that it would say "deleting 0 files" for over an hour and should I try to cancel the operation it would require me to restart my mac. 

I believe the folder is corrupted but after looking everywhere I cant seem to find a way of getting rid of it! Any help would be appreciated!