Warning!!:

I dont support violence, rape, murder or anything else infact i am totally against what he did.

now the person i wanted to talk about and havent seen anyone talk about his change despite for being extremely popular in the incel community is richard ramirez

and some before images would be:

this is him at 18

the lower image shows him at 12 (this might be taken right after this injury):

also a edit made by people that idolize him (i provided the link because it has many pictures that i was not able to find by searching ):

https://www.youtube.com/shorts/lAJNMJpYlB8

he is a documented proof that changes can happen even after pre teens but infact most of his change happened afterwards
it can be assumed that he started to naturally mew because his posture changed after his habits
but another factor maybe the type of food he ate which was obv unhealthy but im talking about the physical properties of it such as hardness, malleability, etc

he ate humans raw (ik thats messed up but maybe its a sign of eating raw meat. i dont do it tho but i will say that the fact he ate raw stuff and got change might be evidence about the raw meat trend on the .org), he ate alot of candy (they are gummy and sticky and require to hold a biting position to chew them properly), and drugs (it worsened him ofc)