criminalprofiler:“The serial murder is hypothesized to be premeditated, involving offense related fa
criminalprofiler:“The serial murder is hypothesized to be premeditated, involving offense related fantasy and detailed planning. When the time is right for him and he has cooled off from his last homicide, the serial killer selects his next victim and proceeds with his plan. the cooling off period can last for days, weeks, or months and is the key feature that distinguishes the serial killer from other multiple killers”.(Crime Classification Manual, Ressler, Douglas, Burgess, Burgess. 1992.) -- source link