So maybe the grand juries in Ferguson and Staten Island weren't so unusual after all?

I Told a Grand Jury I Saw a Cop Shoot and Kill an Unarmed Man. It Didn't Indict. | Mother Jones

"Many years ago, during the 1980s, I witnessed a killing: a New York City cop shooting an unarmed homeless man near the Metropolitan Museum of Art. I was later called as a grand jury witness in the case. The grand jury did not indict the officer."