-Do the articles have to be sourced or can they come from personal experience and training received.
They don't need to be sourced, however; some form of reference should be found at some point / some form of identification should be referenced as to where the information come from.
Whilst what you did as police, for example, may believe is correct or the only way, you then have to review other police strategies, other countries police, etc... and how they do things. You can write from experience, absolutely, but then you should go looking afterwards through something like Google Scholar or such, to find some referenced material that backup your experience findings.
How much of the overlapping needs to be covered or left out. I am trying to focus on Police related PTSD and the symptoms are the same and treatment is the same so those should not be covered. Should it only be on the topic that is somewhat in limbo to the diagnoses and treatment?
Correct. You would not create a topic on Police PTSD, because there is no such thing. PTSD is PTSD, then there is CPTSD, though that is not official. Police is a type of trauma, or more importantly, emergency services would be the correct name given, covering police, fire and ambulance, as a type of trauma.
It depends on the type of topics you could create on the type of trauma, as to whether more topics would be created on the one subject. For example, whilst you can cover the type of trauma as emergency services and delve into all three areas, you could also create a topic, off the top of my head, separating say SWAT or such, as they would be exposed to different and more likely re-occurent trauma than say the every day police officer, or merely just different types, ie. police see MVA accidents, etc, SWAT are more hostile based trauma, drugs, arms, etc... then there are specialties again, detectives in sexual abuse, they would be readily around a different type of trauma.
Saying that, you could also make one specific trauma on Police, which then breaks down all the different facets of police, as mentioned above, and the different types of trauma each endure... ie. you can't paint police with the same brush, as all see and experience different traumatic events, or less likely to experience traumatic events, etc.
I think right now, the only subject heading is Trauma. So we could create "Emergency Services" and then as sub pages to that, have a page on each, Police, Fire & Ambulance. But we will get to that as more pages are created, so we can see what structure appears naturally.
What topics do you believe you could write upon based on your experience RedTail, and what you want to write upon, being Police?