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Another plan consisted of implanting his devices in " free coffee and donuts " tickets he handed out in front of the police stations in Gotham.
That plan had him controlling most of the cops in the city, inciting them to steal for him, and ultimately to riot.
Tetch's role in the deaths of the Gotham Hawks High School Baseball team is eventually discovered by detectives in the Gotham City Police Department.
After sending the police away, telling them that the team had been " bad kids " that they " deserved it ", Tetch contacts Ella Littleton and warns her that the police might uncover her role in the bombing.
Tetch had given her one of his mind controlling hats years before, which she used to try to take control of a guard and try to help Tetch escape from Arkham.
The Hatter is caught as he tries to escape, and the mind-controlled guard fires on police before dying in return fire.
Distraught at the news, Elle Littleton inadvertently tells her daughter Connie that Tetch had killed the team for her, to " avenge her honor.
While working with Black Mask, the Mad Hatter implants a mind control chip directly into Killer Croc's brain, which causes him to mutate again due to the virus he had been injected with by Hush and the Riddler.
Killer Croc embarks on a quest to get payback on those responsible for his mutation, and starts with the Mad Hatter.
During Infinite Crisis, the Mad Hatter is first seen being roundly beaten by Argus, and then later fighting with the Secret Society of Super Villains during the Battle of Metropolis.
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