When beginning to write a mystery novel that has police investigations it is important to understand that there will have to be some science in the story. You may disagree and say that it is not absolutely necessary, but if you want to sound professional, and be logical you want to incorporate at least a little bit of science in. This can establish credibility and the more experienced mystery novel readers will appreciate this.
The first thing you want to do is determine what science exactly you want to incorporate into your novel. It could range from something like DNA fingerprinting to cloning. You do not have to choose only one topic either, it keeps the story more interesting if you include a collection of different forensics for your readers. This also allows for more wiggle room when starting to write your novel as well. If you have more science, the story is easier to work with and build around. It may even provide inspiration when you are going over what topic you want to choose.
When you are choosing what science subject you want to involve in your story it is good to choose something that is more unique and maybe not commonly heard of. This is not the case the whole time, but it could provide for a more interesting plot. Remember you want something that is interesting, accurate, and modern. It must make sense to the reader, and it helps if the science is more up to date or even futuristic, as long as you can explain it and it is true, you have a good science topic.
After you decide what you want, it is time to research! There are many resources you can find on the internet that will supply you with valid and useful information, although you want to be careful when picking and choosing what is fake and what is true. It would not be good to be caught having false information in your story when you believe it is true. There is a way to avoid that situation though. There are books out there that offer information that works perfect for this, or sometimes there are even books made specifically for that. One book that does this is called Murder by Proxy. This will help you get all the scientific part of the plot, so that you can focus on the story writing.
Overall the science behind a mystery novel is important, simply because not only will it make your story more intriguing, but it will also appeal to the more knowledgeable novel readers. If you can add in science into your tale, you are well on your way to writing a great mystery novel.