Real Name: N/A
Occupation: Criminal
Marital Status: N/A
Base of Operations: Gotham
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: Robin #24 (January 1996)
Created By: Bruce Timm

Lock-Up appeared during the No Man's Land, having taken control of Blackgate Prison in the aftermath of the earthquake. He had enlisted KGBeast and the Trigger Twins to act as wardens for his prison, and ruled with an iron fist; Batman only tolerated his presence because he required Lock-Up to keep captured criminals in check to prevent Gotham being overrun, although Lock-Up was under strict orders to treat the prisoners well. Towards the end of the storyline, Batman enlisted Dick Grayson's help in overthrowing Lock-Up so Blackgate could be used for the lawful side once again.

Lock-Up makes a very brief appearance in Villains United: Infinite Crisis Special where it seems the Society made use of Lock-Up's expertise to break metas and humans out of prisons all over the world, leading to the big fight in the final issue of Infinite Crisis.

Having recently captured Charaxes, Two-Face, Robin, and several gangsters and taken them to his private prison, Lock-Up planned to drown them all in an underwater death-trap. Batman intervened and defeated Lock-Up, saving the villains and Robin.