Sharpton and Jackson and others are beginning to have some backlash and creditability problems. Sharpton has crossed the line in New York and both are hiding out after the Brown case resulted in the rioting, looting, and burning of Ferguson. I think the least thing they want is notarity at this time. They have done their job lighting the fires in the black community.
OTH, the black community (both local or national) is in an uproar and one might demand Holder and his DOJ look into the matter. In which case, it will disappear into a black hole and never see the light of day because they are unable to prove any of the imagined civil rights violations have occurred.
If they try to pull a "Ferguson" in Texas City, they might find stronger opposition to their cause than they anticipated. And at best, their cause is weak in the Texas City incident. This too will pass for an honourable mention in the media. But no, this is not the big one they want.
Good shooting Officer. Civilization thanks you.