Watts had murdered dozens of women between 1974 and 1982, and despite the many women he murdered, Watts was not discovered as a serial killer for almost eight years.
Martin admits to murdering dozens of women, but denies killing his sister.
In the Balkans, Europe could not bring itself to take meaningful action until thousands of Europeans had been murdered, dozens of towns blown apart.
Here's Gwin, who's probably murdered dozens of men and women too for all we know, and yet he strikes me as pathetic.
By murdering dozens of mayors, it has discouraged many from running as candidates in this November's municipal elections.
In the last several years, they have murdered dozens of journalists and scores of judges.
The story of the Green River killer, who murdered dozens of women in the Pacific Northwest before he was captured in 2001.
Careful examination of the information on the computer reveals that she is a clinically insane mass murderer, convicted of torturing, castrating, and murdering dozens of young boys.
On 9 November 2011, a court in Ahmedabad sentenced 31 Hindus to life imprisonment for murdering dozens of Muslims, by burning a building in which they took shelter.
In Chicago, the notorious Shotgun Man murdered dozens of people in broad daylight on the same street corner during a decade-long reign of terror.