Name - unknown, people just call him Jack for short.
Alias - Skeleton Jack
Age - Presumably late 20's, early 30's
Powers - appears to have heightened physicals
Skills - say's he's good enough to give Batman a run for his money in hand to hand. He's a skilled marksman with projectiles and guns. Claims to have served in the military.
Equipment - his fists, lockpicks and blades stashed in his boots and gloves, his helmet... THAT HE NEVER REMOVES
Personality - Stoic, blunt, passive 
Appearance - 
[img=http://img.photobucket.com/albums/v221/thekidlantern/Batmen-Skeleton-Jack_zps70d5fe8a.png]

BRIEF Bio - Skeleton Jack is a relatively new face in Gotham. He seems to be a little more on edge and has severely pummeled punks in the city for dealing drugs, robberies, as well as vadalism. After a few nights out he finally came to blows with Batman after the hero set up a robbery. Both were seen beating each other on Gotham rooftops, but it was unknown exactly what was said or done in the end. It's been made clear Batman doesn't approve of Skeleton Jack breaking a criminal's back after the punk pulled an automatic out of his backpack on the anti-hero. Jack was quoted as saying "He won't go to jail for the crimes he's committed that were never proven, but his prison will be that of his broken body. For the rest of his life..."

Batman himself kept tabs on all of the new recruits in Gotham. He tried to keep better tabs on Jack but he couldn't find any leads on him outside of his activities at night. With the League of Assassins threatening Gotham Batman will use all the help he can get and put all of his remaining time into a counter attack on the LoA. None of the new recruits have been to the 'Cave, however Jack has made mention of it to at least one of the heroes he's come into contact with. Skeleton Jack is viewed by most as a potential threat because of his near lethal force. 

Notes - He won't reveal his secret ID to anyone. Later on when we're rescuing Batman from the LoA it will be a loose end that is tied up. 

~KL~