Brendan Krug is the little half-brother of Jerry Dupree and the second son of their mother. Brendan and Jerry were regularly beaten by Mrs. Krug, Jerry getting the worst of it for having a shoe fetish and taking the blame for Brendan's father getting a divorce with Krug.
Jerry became a shoe burglar and later a violent offender because the battery destroyed his brain's inhibitions. Brendan was a witness but reluctant to speak out of fearing Krug's wrath. Jerry, however, came forward instead when told to think of Brendan and how he'd be beaten alone once Jerry was taken into custody. As a result, Krug was arrested, Jerry was institutionalized, and Brendan was arranged to be moved to a different living arrangement. (SVU: "Tortured")