No Charges in Tamir Rice Slaying

It is not actually a shock to learn that the grand jury has declined charges against the officers involved in the shooting of 12-year-old Tamir Rice. True, there were apparently problems with the Cleveland Police Department uncovered by a DOJ investigation. True, there were questions about the fitness of the officer who fired, Tim Loehmann. And it was true that an Ohio judge determined that there was certainly probable cause to file charges without the inquiry of a grand jury.

But when the prosecutor in this process made public a few studies that found the shooting "objectively reasonable", what else was there to know? If the intention of the prosecutor was to establish that charges should be brought, but to exonerate the officers, why did he even bother? To share the blame for nothing happening?  I have opinions about that guy of course. (They are not good opinions.)