Theories - obsession with knives?

So there are THREE Jacks:

  1. Jack D, ex bf who the calls were made to.

  2. Jack S, neighbor and food truck dude (hunter with Ka-Bar knife)

  3. Jack K. Ethan paid him for something that night and he set up the GoFundMe.

Also, seems that the common view with many profilers is that this is a male.

On another forum someone posted images of a Pinterest profile allegedly belonging supposedly to one of the female room mates who had 15 pinned images of knives. A post was supposedly made at 3:33am (12:33am) by this room mate posing with Kaylee on Nov 13 2022.