If he was kicked when he was already forced out of car, cuffed, and on the ground as I'm sure their procedures call for, then absolutely that is excessive force. Whether running his mouth or not, that guy should be fired. Unless he was trying to get up or was kicking himself. But I haven't seen that. They have all the body cam footage and it should be released or at least shared with Hill's lawyers.
But I stand by what I said, hauling his ass out of car, cuffing, and telling, then having to force him to the ground, was all necessary.