This week Mark Guerrero features musician Gilbert Rocha whose band The Silhouettes included the late great Ritchie Valens. Rocha later played with the doo wop duo, The Perez Brothers, and Rulie Garcia aka Johnny Chingas, who wrote and recorded both serious and comic songs in a pseudo pachuco style. In this Mark Guerrero interview, Gilbert talks about his experiences with Ritchie Valens, The Perez Brothers and Johnny Chingas and plays some of their music.