Vectortuts has taken the law into their own hands by setting up another tremendous tutorial. As expected, each step is wonderfully illustrated with very clear directions. 
If you follow these steps carefully, what you will end up with is a police badge. Remember, crime does not pay, so don’t just steal this lesson. Take some time to get to know the talented instructors at Vectortuts.

“In this tutorial, we’ll explain how to create leather material in Adobe Illustrator with modified patterns, gradients, and layer blends. You’ll learn a simple way to create stitches and how to make shiny metals.”

*Source: Vectortuts