What is the mood of verb in this sentence Buster has escaped from his dog pen?

The mood of the verb "has escaped" in the sentence "Buster has escaped from his dog pen" is indicative.

Here's why:

* Indicative mood describes a fact, a statement of reality, or a belief.

* Imperative mood gives a command or makes a request.

* Subjunctive mood expresses a wish, doubt, or a hypothetical situation.

In this sentence, the verb "has escaped" states a fact, a past event that has happened. Therefore, it is in the indicative mood.