I thought that serial killers had serial numbers like products did so the cops could identify them easier.
A childhood belief about criminals

others believed things like this
- When I was really little i thought serial killers were people who stole your cereal.Anon
- When people talked about serial killers, I thought that they put poison in your cerealAnon
- i used to believe that serial killers were going around killing all of the cereal— Tiffany
- I used to think serial killers killed cereal— YumYum
- I used to think that Serial killers were people who poisoned cheerios.— Ashley
- I used to believe that serial killers violently ate their cereal...yeah..Anon