A now-dead Arkansas man has been linked to the grisly double murder of his son and daughter, who were stabbed to death with a butter knife more than 42 years ago. Weldon Alexander was identified as the suspect in the deaths of 13-year-old Gordon Alexander and 14-year-old Karen Alexander, who were “brutally murdered” in 1981, the Texarkana Arkansas Police Department announced on October 12. RELATED: Police Hunt “Armed and Dangerous” Massachusetts Air Force Vet Wanted for Allegedly Gunning Down Wi