Serial murder peaked during the 1970s and 1980s , James Alan Fox and Jack Levin write . Rapid growth of U.S. prison population may have contributed to the decline , they say . Comment:
Serial murder peaked during the 1970s and 1980s , James Alan Fox and Jack Levin write . Rapid growth of U.S. prison population may have contributed to the decline , they say . But there are still as many as 10 serial killers captured each year by police , they write .