This is more of a question, rather than a concrete help, but I'm reading your post just a day after being at a neighborhood community meeting in which police presented to the community on safety. What struck me is how much the general community is responsible for deploying police.
The officers were there to tell residents the research and work they had done on complaints that were voiced at a previous meeting. The community members did not possess trauma-informed language- they were very punitive and blaming in the way they described the problems they saw: transience, prostitution, bad teenagers playing basketball in the park after dark.
It made me realize that once police do become trauma-informed, they will need skills for dealing with this kind of public accountability- the people who write letters, the woman who said she called code enforcement 24 times about a neighbor whose car has an out of state registration (!).
In order for police to effectively transform their practices, their demanding publics are also going to need training. And police will need skills for talking to the demanding public about why police are taking a more trauma-informed, trauma-sensitive approach to resolving issues in the neighborhood.
Really great work you're embarking on, I look forward to following the progress and results and hope you will post them on ACEs!