A 17-year-old has been charged with first-degree murder in the stabbing death of his mother at their North Carolina home, where her body was partially located inside a recycling bin, according to police. Isaac Tracy was arrested in connection with the killing of Katharine Svaldi, 49, at their Fayetteville residence the evening of Tuesday, February 10, according to a news release issued by the Fayetteville Police Department that day, and an update issued by the agency on Wednesday, February 11.