Fa/k/e Cops, pretending to be cops
Buying cop gear, wearing cop gear, buying cop cars that look vaguely similar to your local precinct.
Use cop issued guns, with cop haircuts

Pulling over kommandos because they are too afraid to run, getting the jump on kommandos because they are too afraid to draw.

https://www.youtube.com/watch?v=ox1zwCBeRTY