True crime fans, craving deep dives into underrated American serial killers? Tonight’s your night! Season 2 of *Unknown Serial Killers of America* drops Sunday, August 2, at 10 p.m. on Oxygen. Ditching overdone cases, it uncovers vicious, under-the-radar killers whose sinister crimes shocked local communities but never got national attention—chilling acts that’ll keep you glued. Watch for free via DIRECTV’s free trial to stream live, or subscribe to catch past episodes. Setting a reminder yet? Which lesser-known cases grip you most: under-the-radar ones, or those with wild twists?