She was kind enough to come up with some mitigating circumstances.

It wasn't a first offence and there were no mitigating circumstances.

Even in your culture, there must be some mitigating circumstances.

"There are some mitigating circumstances that will be presented in court at the appropriate time."

For instance, that there were quite definitely no mitigating circumstances.

Yes, she had committed a crime, but the mitigating circumstances were compelling.

The only mitigating circumstance is his claim that he was protecting you.

There are no mitigating circumstance for committing an evil act.

"The question was were there any extenuating or mitigating circumstances."

The mitigating circumstances of a crime are only slightly clearer.