Unsolved: Tracking Terror

Unsolved: Tracking Terror is a side quest in the Fallout 76 add-on Wild Appalachia.

Quick walkthrough
Investigate the Monongah police station (at the northwestern end of Camden Avenue) to find the following clues:
 * Forensics report - On the front counter, under a box of Dandy Boy Apples.
 * Animal control report - On a file cabinet near the bathroom upstairs.
 * Incident evaluation - Note, in a file cabinet by the terminal
 * Read terminal entry - Incident 1542

Investigate the lake in the Savage Divide referenced in the animal control report (next to Site Alpha) to find the following clues:
 * Page from Dr. Frank's journal (cannot be picked up) - Near a pile of bones on the southwestern side of the lake.
 * Jackson's notes (cannot be picked up) - On a shelf near the elevator to the missile silo.

Track the mysterious animal upstream by searching for signs.
 * There will be several piles of bones near the stream.
 * Last page from Dr. Frank's journal (cannot be picked up) - On the southern bank of a lake upstream from Site Alpha

You may encounter the 'Son of Fluffy', a legendary diseased yao guai, during this process.

Investigate Fluffy's den for the following clues:
 * Skeleton of Dr. Frank, employee of Nova Biogistics
 * Dr. Frank's journal - Next to a skeleton.
 * The corpse of a dead mutated bear - "Subject J12: Fluffy"