Arthur Cooper (Earth-90: Pre-Crisis)

"Pike, this is Chief Cooper. I'm giving you sixty seconds to come out of there, or we'll fill that building with so much tear-gas, you'll be crying for the rest of your life."

- Chief Cooper to Nicholas Pike

Arthur Cooper was the chief of the Central City Police Department.

The Dark Riders Attack
In 1990, when the Dark Riders attacked the city, Cooper was on television telling Joe Kline that the police will do everything they can to stop the Dark Riders. Later, he promoted the motorcycle squad that could prevent any attack from the Dark Riders. But his promotion was attacked by the Dark Riders and Cooper got injured. Some time later, Barry would come to his office and inform him about the breakout the Dark Riders planed to do. Cooper would participate in the prison siege in order to bring Pike to justice.

The Museum Theft
When a crime wave hit the city, Arthur pulled off all officers from the Central City Museum to stop the wave.

The Deadly Nightshade
In 1991, Cooper asked Rebecca Frost to give him psychiatric advice on the Deadly Nightshade.