Who wrote the ransom note?

The question of who wrote the ransom note in the JonBenet Ramsey case has been subject to much speculation and analysis. Bill James noted that the construction of the letters in the ransom note matched Patsy Ramsey's handwriting, but the individual execution of these letters was distinctly different. He concluded it was obvious that Patsy Ramsey did not write the ransom note, a stance supported by other experts who would not testify in court that she had written it 1.