[Warning: Potentially Triggering Content] An Oklahoma man has pleaded guilty after sexually abusing and impregnating an 11-year-old. On Thursday, Dustin Walker admitted in court to impregnating the child, who was his own stepdaughter. WTAF. An investigation was first launched into the case last summer after the young child was brought to the hospital after giving birth in August, according to court docs seen by FOX 23. Per the outlet, the girl had not been seen by a doctor for an entire year by the time she gave birth.