A woman charged with voluntary manslaughter and child abuse pleaded guilty Monday in Camdenton.Roshell Johnson was charged a few days after 20-month-old Ocean McCoy died at University Hospital in Columbia the day after sustaining serious brain injuries from shaking and non-accidental head trauma on Jan. 29, 2008, while under Johnsonâ??s care at a Brumley-area home. The residence was shared by Johnson and Oceanâ??s father.The guilty pleas were part of a plea agreement, â??in which the defendantâ??s pleas were accepted to amended charges of voluntary manslaughter in knowingly causing the death of the child and abuse of a child by inflicting cruel and inhuman punishment upon a child resulting in serious injury leading to death,â?? according to Miller County Prosecuting Attorney Matt Howard.Johnson, now 37 years old, faces anywhere from ten to 25 years in prison.A pre-sentence investigation and sentencing assessment report to be prepared by the Missouri Division Probation and Parole was ordered after the guilty plea. Final sentencing was scheduled for July 9 at the Camden County Courthouse.Johnson will stay in the Camden County jail pending her sentencing, where she has been in custody since the case was transferred from Miller County in 2009.