I would suggest the "reverend" do a tour with the police/detectives to see precisely who is hampering the investigation. Sheriff Clarke is absolutely correct in his analysis. The black community demonstrably proves that they do not believe black lives matter.
Check out the blog of a Chicago cop. Secondcitycop.blogspot.com
His blog and the comments tell the truth. Check out the entry about block parties in the hood. Chicago cops know they are not supported by the city leaders or in certain communities.