Maybe.

 Alfred Long's census record, 1871, showing he's two years older than his actual years. He was born in 1855.

Alfred Long's census record, 1861, showing his/family London, Islington, connection.

Maybe the census was written incorrectly.
Maybe he had no ill motive to use an alias, with that rather mockingly toned, James Short, when he joined the 9th Lancers in Aldershot.
Maybe that bullet wound in his forehead didn't cause traumatic brain injury from battle in Afghanistan.
Maybe he didn't suffer from post traumatic disorder.
Maybe he didn't have a pesh-kabz knife that could piece armour, stab and slice. 
Maybe 9th Lancer's nickname, the Delhi Spearmen, meant nothing to him.
Maybe the history of his unit was meaningless. (officer's wives had their unborn children ripped from their bodies).
Maybe he thought that piece of cloth was important because he had telepathic powers.
Maybe he didn't have to see in the dark. Not when he carried a lamp.
Maybe he had a silent step because he wore police issued india rubber boots.
Maybe he could approach women with impunity because he was a policeman.
Maybe the writing is on the wall, and Alfred long is Jack the Ripper.