A 17-year-old was accused of stabbing his mother in Florida just one year after the murder charge against him was dropped in the fatal shooting of his father in Oklahoma. Sheriff Grady Judd in Polk County, Florida has described the 17-year-old as being a “cold-blooded murderer” after he stabbed his 39-year-old mother last weekend. The murder occurred at the teen’s grandmother’s home in Auburndale, Florida.