Investigations are underway in West Virginia and Pennsylvania after authorities say 22 year old Rachel Nelson of Costa, in Boone County, attempted to smother her 4 month old son on two occasions on October 18th while he was a patient at Pittsburgh Children's Hospital. Nelson and the boy's father Shawn Nelson, 43, were approached by investigators after they reviewed surveillance video. Pittsburgh Police say Rachel Nelson admitted to holding her son tight to her chest until he stopped breathing. Nelson has been charged in Pennsylvania and is being treated at Western Psychiatric Institute and Clinic. Detectives say an investigation shows Nelson may have smothered her son numerous times in Boone County between August and October. The Boone County Sheriff's Department is investigating.