He has that right if a court finds him mentally competent to stand trial.

A person must be mentally competent to complete this document.

Both partners must be 18 or older and mentally competent.

The law says the patients must be mentally competent when they sign away that decision.

In most cases, patients must ask a review board to find that they are mentally competent to decide.

We everyone might not be mentally competent enough next year to do the job.

But they disagreed over whether he was mentally competent to stand trial.

Amnesty International said the young woman was not thought to be mentally competent.

They had earlier been accused taking money from someone who was not mentally competent.

Only about 10 percent of mentally competent adults have signed a living will.