What makes a defendant incompetent to stand trial in Texas?

Question

Accepted Answer

This question has been addressed in 1 Texas court opinion(s), including Gerardo Solis III v. State. A judge’s 'vibes check' or a party's polite courtroom demeanor cannot override evidence of mental incapacity; if there is even a scintilla of evidence that a party cannot rationally assist their counsel, the court is legally required to halt proceedings and appoint a competency expert.

Competency Standards

What makes a defendant incompetent to stand trial in Texas?