Gillian Loeb (New Earth-One)

The Corrupt Commish
Gillian Loeb's early life is largely unknown, but what is known is that at an unknown point Loeb joined the GCPD and rose through the ranks to become the Commissioner. After becoming the Commissioner, Loeb decided rather then fight all the crime in Gotham he would make deals with various criminals and criminal organizations that he will look away from certain crimes in exchange for payment.

The Batman
Loeb's deals would hit a snag when a vigilant known as the "Batman" began take down multiple criminals forcing Loeb to place them under arrest due to multiple witnesses. Batman also began showing up Loeb's men, due to the fact more criminals were being apprehended by Batman than the GCPD. Loeb then began a campaign to discredit Batman by calling him a simple vigilant that must be apprehended at all cost.

Knife Killer
After a string of murders caused by a unknown serial killer began occurring throughout Gotham, Loeb decided to use the public's fear to his advantage by declaring that the Serial Killer now dubbed the "Knife Killer" was non-other then Batman. Loeb then decides to find the real "Knife Killer" and make a deal with him to continue his murder spree to further incriminate Batman.

Loeb after having his men look over some of the "Knife Killer's" victim locates where the killer got his knife. Loeb and his men arrive at the shop, where the knife was sold and find the owner dead. Loeb knowing Batman will eventually end up at the shop too decides to set up a trap to capture Batman and arrest him. Batman eventually does arrive, but quickly escapes Loeb and his men before they can capture him.