Can't Empty Trash

[pm-r]

… … … I did once have a client who had never emptied his Trash. Had less than 10% storage and I was scratching my head trying to find where it had all gone. He had 170Gb of data in Trash.

Ahh yes, how many of us have got caught on that type of problem over the years??? LOL!!!

And as for OS X's Secure Empty Trash, I was reading the other day why it was removed from the latest El Cap'n, basically because it didn't even work properly. But I'm sure some Terminal geeks could make it work.
http://osxdaily.com/2015/10/12/secure-empty-trash-equivalent-mac-os-x/