Police Refuse To Release Body Cam After 1 Year

My brother in law was shot by police for suspicion a non violent, non criminal act with poor circumstantial evidence over a year ago. He refused to identify for a non crime and the situation escalated to his demise according to the report. We have reason to believe he was treated unjustly.

We have been attempting to get a lawyer but have been told by many various agencies we will need to get the body cam footage before they would be willing to take the case as the state we live in is very red(Idaho). Many lawyers wouldn't even respond to our request without this footage.

Our application to get this footage has been denied every month it's submitted due to it being part of an ongoing investigation. This investigation has been ongoing for over a year with, from what we can determine from the reports provided, only internal members of the police force.

My partner and her father are very much willing and wanting to move this case forward but are caught inbetween the police force not willing to treat this investigation with any sense of urgency and being unable to find legal counsel due to a lack of video evidence.

I understand that I am unable to do much legally in my position, this post is for them and the advice they need to get going forward.

What resources can we utilize to help find justice for my brother in law. To help this investigation either conclude or for body cam footage to be released prior to this. We've contacted over 150 local and some out of state law offices but arnt receiving traction.

Are call campaigns and other such initiatives a good idea?