should adult be tried as juvenile in courts

They always talk about putting some minor on trial and pretending he is not a minor, but what about the other way around?  There may be situations where we want to put an adult on trial and pretend that he is a juvenile.

For instance, if he watches Pokemans all day then he might be like that, or maybe he is a pothead since he was 12 and his brain never got older.  Or maybe he only did juvenile crime so he should only do juvenile time, such as spray-painting LOL MY BALLS on a school wall.

The mental capacity of an individual should be examined prior to trial, but as I regard most of psychology as bordering on pseudoscience, I'm not sure there's a sane way going about that.

>>3
The idea that people with autism are mental invalids/idiot savants is mostly the fabrication of Hollywood, but I can see in certain extreme cases where there may be a case for that.

This sounds like it would be a good idea in theory, but law works on individual cases already, so it's pretty much moot to suggest this in practice.