But while working on a previous study, Harrison started to notice a difference between male and female serial killing patterns that she was interested in exploring. While there is considerable public interest in serial killers, Harrison said there has been little research on these crimes, possibly because serial killers are relatively rare. "So if you know that men are more likely to commit a crime in a certain way and women are more likely to do it another, hopefully it can help investigators go down the correct path." "If a murder has been committed without a known suspect, you can sometimes use details of the crime to form a profile of what the perpetrator might look like," Harrison said. Marissa Harrison, associate professor of psychology at Penn State Harrisburg, said the findings could help inform murder investigations. Female serial killers tend to "gather" their victims - targeting people around them who they may already know, often for financial gain. The researchers found that male serial killers tend to "hunt" their victims, who are often strangers to them.
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