Child Killer Challenges Conviction:  A North Carolina criminal, found guilty in 2013 of the kidnapping, rape, and murder of 5-year-old Shaniya Davis, is asking the state supreme court to overturn his conviction and death sentence because his defense counsel told police where to find the victim's body.  WRAL News reports that habitual felon Mario McNeill had recently been released from probation when he went to Antoinette Davis' mobile home in Fayetteville on November 10, 2009, to collect a $200 debt.  Davis later admitted, "I gave her (Shaniya) to him to cover $200. He was only supposed to have sex."  McNeill left with the child.  He was arrested three days later on suspicion of kidnapping.  Hoping to get a better deal for his client, McNeill's defense attorney told detectives where to find the child's body, which had been dumped in a kudzu patch.  The Associated Press reports that at his trial, where McNeill pled not guilty, the jury deliberations lasted less than an hour.  His appellate attorneys are claiming ineffective assistance of his trial counsel for ruining McNeill's claim of innocence.  McNeill's criminal record includes a 2003 conviction for shooting three people.