Uniform Stealing Board

Black Siren (Katie Cassidy) kills a woman offscreen and steals her shoes.

Here's the scene leading up to it. Unfortunately, I can't find the later scene where she's wearing the shoes:

https://www.youtube.com/watch?v=KCVC-O6_GYA

In the next video "Black Siren - Sonic Scream" the girl with the yoga mat is shown sitting against a wall in the garage dead, and the blonde wearing the sneakers the dead girl was wearing.