Alpha-numeric Character Study of the Ransom Note
First Page: The k's
Oliva. Only one example in the Oliva complaint. Leans left which is atypical but overall appearance of the letter seems very similar. See #4 below from second page.
Second Page: The k's
1.RN. #3 is short. #5 has the juncture near the bottom. #6 doesn't have as much separation of right hand extensions. Stem of #8 is no higher than extensions.#'s 2 and 7 lifting up their leg.
Third Page: The k's
Oliva. Looks like # 1 in row above except leans left instead of right.