The first step of proving that it was a slip and fall accident is to take pictures. This will show the location of the accident and any other evidence that might be on the ground. The second step is to collect any evidence from around the area. This could include things like a broken glass or an oily spot on the floor. The third step is to make sure that you have all of your information together, such as your name, address, and phone number. The fourth step is to contact a Chicago slip & fall lawyer about your case.