SoldierDad where is the additional evidence going to come from? There is none. So the kind of investigation you are seeking will be nothing but political circus (to further the agenda of crooks and race-baiters)
It will not bring the dead boy back, nor likely to put the man that shot him in jail. Elongating this situation tho is sure to cause trouble as I see it is here on this thread.
Best that it be laid to rest.
So, you’re all for dropping this even if the man who killed this 17 year old did so without justification? Wow!!!! I hope that you never have a similar incident occur in your neighborhood. Personally, were I to have a neighbor who was responsble for killing someone, I’d want a full and complete investigation. And, if the local law enforcement failed in that, I’d want someone from the state to also investigate. Would you feel comfortable with a neighbor who might have gone off half-cocked and killed an innocent person?