Dennis L. Rader, a 59-year-old municipal worker suspected of being the BTK killer responsible for 10 murders, is believed by authorities to have led a Jekyll-and-Hyde existence.
He was also, according to police, an insatiable murderer who tortured and killed strangers over 17 years, boasting about his crimes in taunting, gruesome letters and poems that he mailed to police and the news media.
More on serial killers, but not only in the USA: this one lived and operated in our own backyard:
Today, Fourniret's wife Monique claims her husband was responsible for another 6 to 10 murders, committed during his séjour en Belgique, bringing the possible tally to +20 victims attributed. Fourniret himself admitted to being guilty of 9 kills already. The story of the Franco-Belgian Serial Pedophile continues to develop and seems to lead to a higher body-count than what Dutroux left us with.?
For accurate info: go Wikipedia