The body of a missing nuclear lab worker has been found, 11 months after she vanished without a trace under disturbing circumstances and fears she held classified secrets.

The body of Melissa Casias, an administrative assistant at Los Alamos National Laboratory, was found in the McGaffey Ridge area of the Carson National Forest.

Casias, 53, had been missing for nearly a year after she didn’t show up for work at Los Alamos National Laboratory. A gun was found near the remains, authorities said.