Shady people are NPCs across the map that give access to certain criminal opportunities. All interactions use the third-eye, unless otherwise stated
There are three shady people in the city offering jobs. Interacting with them allows you to choose a crime from the following list:
Stacy is found in East Los Santos on Amarillo Vista near El Rancho Blvd.
Chad is found in the Port of South Los Santos, on Abattoir Ave.
Jimmy is found in South Los Santos, on Strawberry Ave. and Capital Blvd.
The fourth shady person will take any bags of marked money you happen to... "find", and will clean the bills in exchange for a cut of the money. She changes locations with each server restart, and once you interact with her, you cannot wash money with her again until the next restart.