Mon ami Dahmer (2017) was filmed in Jeffrey Dahmer's actual childhood home in Bath, Ohio. Location Manager Kathy Ruggeri also wanted to film scenes that took place at Revere High School, Dahmer's alma mater, at the actual high school in Richfield, Ohio itself, but the school administration declined her request.
In an interview with Independent magazine, John Backderf reflected how some of Jeffrey Dahmer's subtler dark traits showed up as a teen. According to the article, "Put into context his behavior at school became very chilling, because he was perfecting the tools that he would use to become such a lethal killer. The ability to vanish. The ability to not give anything away and to charm people. The ability to hide everything that was going on in his head. All those things he perfected when he was very young through our goofball antics, he used them when he was a monster. That's a little hard to live with."
John Backderf said it was jarring to talk to Ross Lynch while he was in character and costume, because his resemblance to the real life Jeffrey Dahmer was so strong.
Before each day of filming started, Ross Lynch would watch Stone Phillips's 1994 interview with the real Jeffrey Dahmer on Dateline (1992) to 'get into character'.
Alex Wolff claimed that eerie events occurred when the crew was filming in Jeffrey Dahmer's real house, such as lights turning off everywhere and there being a general sense of unease or nausea among the actors. It remains one of the creepiest experiences in his acting career.