Serial killers often elude capture for years due to nature of their crimes , says James Alan Fox . He says they are hard to identify because they lack obvious ties to the victims . Fox says in many cases there is no crime scene available for analysis . Comment:
Serial killers often elude capture for years due to nature of their crimes , says James Alan Fox . He says they are hard to identify because they lack obvious ties to the victims . Fox says in many cases there is no crime scene available for analysis . Administrative efficiency by police -- and luck -- play a key part , he says .