The Crimebusters were the second group of costumed adventurers. They were intended to become the successor to the Minutemen from the previous era, but were forced to disband in 1977 due to the Keene Act.
Following the break-up of the Minutemen in 1949, the United States continued to operate without organizations of masked adventurers for almost two decades, even though their exploits individually inspired the next generation of heroes. During this period, former Minutemen member Captain Metropolis grew frustrated watching as specialized law enforcement stood still as crime continued to thrive.
In 1966, with the help of Ozymandias, Gardner established the Crimebusters as a potential successor to the Minutemen. Gardner believed that the social climate of America had become so overrun by social unrest that a new collective of masked crimefighters was the answer. It is also suggested that Gardner's motivation was driven by the return of his old adversary, Moloch, who had reportedly founded another underground crime syndicate in New York City.
At their first meeting, a debate arose over the validity and necessity of such a group; Rorschach believed such a group would be merely a "publicity exercise" and would also be "too big and unwieldy." The Comedian expressed the strongest opposition, cynically stating that the threat of nuclear war looming over the world made Gardner's idea of "playin' cowboys and Indians" insignificant in the Atomic Age. To prove his point, the Comedian set fire to Gardner's carefully planned display. The only vocal support for Gardner's idea came from Nite Owl II who believed it was valid since he and Rorschach had some success fighting gangs by working together.
After that memorable meeting, not much is known about how the idea of the Crimebusters went. It is not known if they ever gathered up again or worked communally as a team with headquarters like the Minutemen had. However, this seems unlikely since no team victories were ever mentioned and the vigilantes remained mostly separated.
For instance, Doctor Manhattan and Silk Spectre II went out "on patrol" together where they established their romantic relationship. In 1970, the Comedian and Manhattan joined together to fight in the Vietnam War and ensured US victory. They fought as US agents and not as "Crimebusters".
Rorschach and Nite Owl remained as a pair (as when hunting Jimmy the Gimmick or the Underboss) without acting on behalf of any team. Also, Rorschach investigated the case of Blair Roche disappearance by himself.
Two losses must have affected the numbers of the Crimebusters. The first was the death of Gardner and the second, the early withdrawal of Ozymandias in 1975, who began pursuing business ventures with Veidt Enterprises; however Veidt would continue his aim to save the world from his new position.
The last known time when the "Crimebusters" were seen together was during the Police Strike of 1977. Riots spring up in New York where the Comedian and Nite Owl II attempted to keep the peace; Doctor Manhattan and Silk Spectre II were together once again, settling the riots in Washington, D.C.
The end of the "Crimebusters" and the costumed adventurers, in general, was the Keene Act soon after the riots.