What are signs of a serial k!ller?

Check the freezer for lots of body parts
Usually a good indicator

they act friendly and cute.

rope or duct tape in his pockets is a give away,wearing a ski mask is also a clue, if your family pet disappears your surely onto something,if asks you to meet him after midnight in secluded wood i would be suspicious. remember these handy tips your always safe ,😕🙄

A lot of serial killers start off by torturing small animals. So there’s that.

dead bodies

Stereotypical signs or real life signs?

corn flakes left all around the crime scene

A loner

Quiet. Keeps to himself.

the regular guy
with the suspect moustache
who watch porn a lot 😶
in the basement
the one cruising
coming home late or in the early hours
with the domineering mother
and soft father
and a boring job
the one who was ridiculed in school
who thinks they are very smart

Dead bodies.

A lot of dead bodies

I think it varies a lot. There are loners who are into serial killers and then others who may be ritually killing people while with a group of other people.

Dead bodies neatly stacked

Frequently buys fava beans.