/usr/lib/x86_64-linux-gnu/libcamd.so is in libsuitesparse-dev 1:4.4.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcamd.so.2.4.1
/usr/lib/x86_64-linux-gnu/libcamd.so.2.4.1