I found an interesting article that presents a list of tips collected by the experience of mental health experts who've extensively interviewed serial killers.
One of them is the Psychologist James Garbarino, who’s interviewed killers for over two decades, attempts to find their human side so he can explain their crimes in court. He believes that one’s past pain can influence one’s later infliction of pain on others. In-depth analysis of an array of facts from multiple domains of an offender’s life becomes crucial in this process.
“What does it take to really listen to killers?” he asks. “I believe it all starts with a fundamental refusal to dissociate and disconnect from their humanity.”
” Empathy with others generally comes naturally; with killers, it requires a mindful effort. Yet this effort must be made, he says, because “understanding them is the key to begin making a safer, less violent society.”
Check out the following article for more insight on this topic: