The Case To End All Cases

When Cordelia Holmes leaves the Yard to work at a morgue for the SBPD, she meets some interesting characters: an ME with a taste for the wild side, a head detective with an itch for violence, and, most interestingly, a man who claims to be psychic. Will Cordelia deduce the truth? Find out in "The Case to End All Cases".

Based on the prompt by Fandomspizzawifi:
'Imagine being Sherlock's sister and being able to read people like him and Mycroft. You move to the U.S. for a while where you meet two men named Shawn and Gus, the first of the two claiming he's a psychic, but you immediately know he's lying

*A USA Psych and BBC Sherlock Crossover*
*@fandomspizzawifi owns the idea*
*I am not affiliated with BBC or USA or their properties, please do not assume so*

This started as a Reader!Sister thing, but I changed it because I wanted this to go a bit farther than I could've when writing in 2nd person.