/usr/share/doc/libtrilinos-moertel12/changelog.Debian.gz is in libtrilinos-moertel12 12.12.1-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libtrilinos-moertel12/../libtrilinos-teuchos12/changelog.Debian.gz