One man killed a hundred people. Can that man find a lawyer to save him?

Yes, for example, veterans on the battlefield not only killed 1 people, but also had no choice but to kill each other for their own country, national liberation and their own survival, such as Japanese war criminals who invaded China. Isn't it the same? But it may be a mistake for China to kill one person now, and it is intentional to kill one hundred people. China is a society ruled by law, and even a lawyer with a tight mouth can't let him live.