死刑执行令 A death warrant is an official document which orders that someone is to be executed as a punishment for a crime.
PHRASE 自寻死路;自取灭亡 If you say that someone is signing their own death warrant, you mean that they are behaving in a way which will cause their ruin or death.
By accusing the King of murder, he signed his own death warrant. 他指控国王谋杀,从而让自己走上了绝路。