Tim Mrak, the longtime frontman and songwriter behind San Antonio rock band the Psychoholics, died this week at age 58, following a lengthy battle with kidney disease. Friends described Mrak — who led the Psychoholics for roughly 30 years — as a tireless creative force and a beloved underdog in the local music scene. The band specialized in a catchy and energetic power-pop, and its live shows were known for silly spectacle including members performing in animal costumes and Mrak strafing the audience with a homemade gun that fired fake eyeballs.