[user104658]

Ffs, even if they accepted the mental health problems when considering sentencing, how can it possibly be anything other than murder? You might as well say that murder doesn't exist, because truly "cold, calculated" killings are EXTREMELY rare. The distinction should be purely in the intent at the time... e.g. someone gets punched, falls and hits their head and dies - you could call that manslaughter. But wrapping your hands round someone's throat and squeazing until they're dead? How can that be anything but murder.