Equestria Expanded Universe #15
Human #1

Stripper. Serial killer. Friend. Student.
Pinkamena has a lot on her plate, but she manages to balance it all just fine. From modeling for Rarity to protecting Fluttershy from bullies, all the way to stripping for stacks of cash with her co-worker Sunset, Pinkie manages to keep herself busy. However, unbeknownst to her friends, she also passes time by killing random people. When Twilight begins to suspect something, Pinkie must either avoid exposure... or kill one of her best friends.

This works as a stand-alone and you don't need to have read the other 14 EEU fics to follow along.