October Novel Prep Challenge

I have been thinking of a few conflicts for the climax---I think. Am I on the right track thus far?


Primary conflict possibilities:

Someone is killing people and he/she/they have to stop
Daved is still unsure how his wife died
Police not cooperating with Daved to provide information
One PI contacts and works with Daved on the side, together they get his wife exhumed. ME verifies a small needle hole in her neck.
They Guess that she was killed somewhere other than the boat and K+ was used but cannot prove that K+ was the murder agent because the body automatically releases its own K+ upon death.

I intend to continue.
Thank you,

Kristina