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Serial killing activity in the United States peaked during the 1980s. > Adjusted number of serial killings per 1 million: 7.81 According to the FBI, travelling to other states and countries is actually unusual among serial killers carrying out their crimes.

Rafael Resendez-Ramirez, and known as the Railroad Killer, murdered at least 15 people in Kentucky, Texas, and Illinois before he surrendered in 1999. One of the most recent Texan accused of serial killing, Tommy Lynn Sells, was put to death less than two years ago. A number of serial killers operating in Texas over the years were executed by the state - Texas is one of 19 states where the death penalty is legal, but it is by far the most likely to use it. The high number of serial killings in Texas, as in California, is likely due in large part to Texas’ relatively large population. Nearly 800 murders in Texas have been connected with serial killers since 1900, the highest count of any state after only California. > Adjusted number of serial killings per 1 million: 6.11 We also considered violent crime rates, which came from the FBI’s 2014 Uniform Crime Report. Thus, for the purposes of calculating a population-adjusted rate of serial killings prior to 1960, the populations of Hawaii and Alaska to the officially reported national populations. However, both states were included in national aggregates of serial killings. National populations prior to 1960 did not include Alaska or Hawaii. State populations by decade came from the long-form (or decennial) Census. To calculate the rate of serial killings over the whole period, we averaged each decade’s rate in every state, weighted by population. To adjust for historical population levels, we calculated the rate of serial murders per 1 million residents for each decade from 1900 through 2010 using the state’s (or territory’s) population at the end of each decade. Characteristics of the victims, including sex, age, and race, as well characteristics of the killers, including motive and decade of activity, also came from the database. The database has compiled documented victims of serial killers since 1900 through September of 2014. reviewed the highest numbers of serial killer victims, adjusted for population, from the Serial Killer Database, produced through a partnership of Radford University and the Florida Gulf Coast University.

To identify the 10 states with the most serial killings, 24/7 Wall St.