Josh Gouker pleaded guilty killing his 14-year-old stepson, Trey Zwicker. But now, Gouker’s son is on trial for complicity to that murder. Gouker told multiple versions of what happened that night at one point even saying his son Joshua Young did it. But now, Gouker says his son had nothing to do with it. On Monday, Gouker took the stand and in profanity-filled testimony said his son, Joshua Young, had nothing to do with the murder of Trey Zwicker.For more on this story, watch Jane Velez-Mitchell weeknights at 7 p.m. ET on HLN. Follow the show on Facebook and follow Jane on Twitter.