It's possible this is what happened, but we do not know that for sure. This is what the prosecutor alleges.

>All 13 charges against Hobbs have been dropped. In dropping the charges, a local prosecutor said that there is insufficient evidence that Hobbs committed assault, battery and obstruction at the jail and that the state isn’t prosecuting Hobbs’ drug and traffic charges in the interest of justice.

I'm not in the habit of taking a prosecutor's claims that the person they were originally planning on prosecuting was totally guilty as gospel truth.

Seems like a major fucking issue with police being so violent it prevents the people from getting the trial and justice they deserve if this man was intoxicated (or trafficking, they don't specify the drug charges) while driving.