There may be something about those files that prevents their being trashed from your boot volume but not from a different volume, so I still suggest your rebooting (as per Douglas).

I don't know what those files are, but they're certainly something I wouldn't want on my deuced Mac(hina).

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire