On the final level of the game there is a spot that you can walk into that cops (And FBI) can not get you. This makes this achievement very easyAt the
bottom left of the screen there are 3 boxes stacked on top of each other, if you walk towards the bottom of the screen and to the left so that your character is shown in front of the boxes and get as far left into the corner as you can the cops/FBI will always walk immediately above you instead of around, then just sit there until they get bored and leave.
So simply camp out the lower left area, don't run until you need to get into the spot, murder someone in front of someone else so they run off to call the cops, then run into your hiding spot and wait. The cops will either come from the elevator above you or from the subway car on the right.
Repeat this 4 more times and the achievement is yours, you don't need to finish the level but the 5 must be done in one play of the level.
Here's a video getting into the spot and a cop not getting me.
This unfortunately doesn't count for
Cunning in Party Hard even if you lose the two FBI agents.