Tell you what. Drive down a city residential street at 41 mph in a 25 zone, strike and kill a kid playing in the street, and see if you get charged with manslaughter or negligent homicide! 16 mph over the posted speed limit is not a small difference.
41 in a 25 is markedly different from 71 in a 55. Stick with the facts of this case. That’s what the grand jury did. (I don’t know how things work in Maryland, but usually the prosecutor can indict on his own. He probably took it to the grand jury for political cover.)