Bates letters compared to letters sent to Jack Ruby

I'm not 100% sure how this was established to have been from someone in the Minutemen, but look at the handwriting from these letters sent to Jack Ruby in late 1963.











Notice the 3-stroke "k" and the lower case "r" that looks like a "v" or a checkmark? Those three things stand out as being very Zodiac-like. But the bottom letter looks very similar to the Bates letters.

Also, compare the upper case "B" and they look like the number 13.

im no expert but my opinion is that it is the same person who wrote those letters