[TylerLives]

Facial asymmetry, testosterone (thick eyebrows, baldness), weight, piercings, tattoos, unnatural hair colors etc. surely have some correlation with being a serial killer?

[Jensson]

Also to being a coder. Coders and serial killers are both very male groups, so likely share many of the same signals.

[RugnirViking]

do the research and report back. I'd be surprised by "unnatural hair colors" personally, but "surely" isnt the way for that sort of thought

[psychoslave]

Any measurable characteristic will allow to establish some correlation, but it doesn’t necessarily will be a high correlation.