I know the whole story from the Dudley and Bob radio show in Austin. The bottom line is that he was assaulted and should sue.
When you don't precicely follow orders of an APD officer, they can simply tackle you, punch you, and break limbs until you verbally agree to their orders. That's what happened to Jason.
An officer barked at him while he was standing in an empty street with some friends in the early morning. No one likes to be rudely yelled at out of the blue. He was told to get on the sidewalk, but he walked up to the curb only an inch or two from the sidewalk, clearly out of the way of any traffic which was nonexistant at the time.
That wasn't good enough for the APD which barked at him again. After the second command, he stood his ground on the curb. At that point the officers simply tackled him, beat him and cuffed him. Tackling and beating someone is assault. It isn't resisting arrest.
He was not intoxicated and the officers made no effort to prove he was intoxicated. So it was false arrest and false imprisonment.