In the UK there are no separate forensic phptographers. The work is done as part of the CSI's job (what used to be called Scenes of Crime Officers or SOCO's). To get on the CSI course you need to have a good Science degree.
Posts are advettised on local Police force websites, under civilian vacancies. They get LOTS of applications due to the popularity of the CSI TV shows, so they can afford to pick & choose the best candidates. Once accepted, you attend a 3 month training course at the National CSI school in Durham.
There you do fingerprints, forensics and photography. The moneys ok - but you do of course do shift work. There is an opportunity to go up salary scales to senior posts as you gain experience and further knowledge.
As well as an interest in forensics you need other qualities for the job eg. not squeamish, not afraid of heights/enclosed spaces etc. (you'd be surprised at some of the places you have to get into! ).
From what I've seen, interning in a forensic child abuse center once, there is no "forensic photographer." The nurse did the photos where I was. I've seen cops just have a little camera in the car they take out when they need it.
Most cops probably get a little 2 hour course on what angles they need etc. When a friend got hit by a car I saw the pictures and thought "I could get so much more detail which could be useful in some cases.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.