What sort of name is this type of crime?

A man notices an unlocked window in a strange neighborhood, and no one's home. He opens the window, then chucks an alligator through the window, then closes the window, and leaves. He takes nothing. He himself didn't enter, and he didn't break anything. He just deposited an alligator. The family comes home to an alligator in their living room - and they live too far north for alligators to logically be there.

Trespassing? Mischief? Some additional name? I was having a Facebook discussion about this.
9 mo
The alligator is a baby alligator. The goal isn't to endanger, so much as confuse.
What sort of name is this type of crime?
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