Under which condition is homicide by a public officer considered justifiable?

Homicide by a public officer is considered justifiable when it occurs in obedience to a competent court's judgment. This means that if an officer is acting in accordance with a lawful order or judgment issued by a court, the actions taken can be deemed justified under the law. This principle is based on the idea that public officers have a responsibility to enforce the law and do so within the boundaries set by the judicial system.

When a public officer follows a court's judgment, they are enforcing the rule of law and acting within their legal authority, which is essential for maintaining societal order and accountability. The rule also underscores the importance of due process and ensures that actions taken by law enforcement are grounded in legal authority rather than personal discretion or judgment.

The other conditions listed do not provide lawful justification for homicide. Acting without warning or based on personal feelings of threat removes the objective legal framework necessary for justifiable homicide, which relies on court decisions rather than personal circumstances. Additionally, convenience should never be a factor in determining the legality of an arrest or the use of force, as it undermines the principles of justice and proper law enforcement.