/usr/lib/x86_64-linux-gnu/libfreenect_sync.so.0.5 is in libfreenect0.5 1:0.5.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfreenect_sync.so.0.5.3
/usr/lib/x86_64-linux-gnu/libfreenect_sync.so.0.5.3