Oregon state law defines:
163.118 Manslaughter in the first degree. (1) Criminal homicide constitutes manslaughter in the first degree when: (a) It is committed recklessly under circumstances manifesting extreme indifference to the value of human life; (b) It is committed intentionally by a defendant under the influence of extreme emotional disturbance as provided in ORS 163.135
163.135 Extreme emotional disturbance (a) that the homicide was committed under the influence of extreme emotional disturbance if the disturbance is not the result of the person’s own intentional, knowing, reckless or criminally negligent act and if there is a reasonable explanation for the disturbance. The reasonableness of