A very large group, each with a different face,
Usually in groups of four, its identity is your case.

The first will bring a desire that is wealth
To steal it though is tough and takes stealth.

The second group will distract you and lead your mind astray
Do not let this happen or you life will soon pay.

The third group can be used to take a life
A brutal murder it would be without a gun or knife.

The final group is a tool that is used to hide
The man that was in your way and just happened to have died.

So you better be going now, I hope you paid attention.
What is this mysterious association I mentioned?