Open a terminal and type sudo nautilus to open the file browser as
root. Navigate to your home folder (/home/<your_user_name> and type
ctrl-H to display hidden files. Find the folder .trash and delete its
contents.

Now, this *should* remove the files from your system but I have known
files deleted in this way to simply be moved to root's trash folder so...

Check your home folder for a folder called .trash-root; if there is no
folder, check to see if there is a /home/.trash-root folder; finally, if
there is no such folder, check in /root/.trash

Hopefully, this should solve your problem.