Title: If I'm a Mermaid. Part 1/2. (The second part is complete and will go up next week.)
Rating: PG-13/T-ish - about as much as your average episode
Pairings: gen.
Summary: a sadistic UnSub hellbent on revenge puts the BAU on a coast-to-coast chase.
Warnings: it's a casefic. Mentions of dismembered bodies, references to possible sexual violence, references to various other forms of social violence.
Timeline: set circa Uncanny Valley.

Love and gratitude to Mara and recessional, who beta'ed.

Archived also at AO3.

( Therein lies the defect of revenge: it's all in the anticipation; the thing itself is a pain, not a pleasure; at least the pain is the biggest end of it. -Mark Twain )