Good for you for not killing it. That thing is rodent destroyer, and mice don’t enjoy having them around to the point they will vacate if it hangs around long enough.
Freegards
Wife has changed her attitude. Daughter has a snake living under her house. Wife saw it catch two mice. Wife has learned how to distinguish poisonous from non poisonous now. She still startles when she sees one but she stops and recites the signs of poisonous snakes then relaxes.