Tonight, at 9PM EST, is the third episode of Marked on the History Channel, a show that seeks to reveal the dark underbelly of tattoos.

Tonight, they look at Chicano style tattooing. The black & grey stylings that rose from the LA streets and prisons, and have been refined by tattoo legends like Good Time Charlie Cartwright, Jack Rudy, Brian Everett, and Freddy Negrete (whose work is shown right).

In fact, Negrete is featured in tonight's episode. Here's what director Robert Palumbo says about it:

"Artist Freddy Negrete, one of the originators of the Chicano style, takes viewers on an exclusive journey, deep into this unknown world where we decode the ink that decorates the bodies of current and former Chicano gangbangers."

For the full schedule of Marked episodes, check the History channel site.