Do not get more free space after deleting files!

Hi there,

also posted in another Community.

Maybe that one is the right.

Ich copied my iphoto Library (300GB) to an extarnal HDD.

I deleted the Library from my MacBooks HDD (750 GB, one Partition).

Then i cleaned the trash bin.

After several reboots, there is still not more free space! The files are gone (checked that with sevaral tools).

"Information" of internal HDD gives me 460 GB free space, but OSX HDD Tool just tells 150 GB are free!

HELP!!!