Can a nest cam be disconnected?

My sister is in an abusive relationship. Her boyfriend has a camera by their door and controls her coming and goings. We (family) are going to help move her and her kids out without him showing up and making a scene in front of the kids. What if we turn the power off in the house? disconnect router? Will he get... show more My sister is in an abusive relationship. Her boyfriend has a camera by their door and controls her coming and goings. We (family) are going to help move her and her kids out without him showing up and making a scene in front of the kids. What if we turn the power off in the house? disconnect router? Will he get alerts when these things happen?
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