Like most cloud-enabled home security cameras, Google’s Nest products don’t provide long-term storage unless you pay a monthly fee. That video may not vanish into the digital aether right on time, though. Investigators involved with the high-profile abduction of Nancy Guthrie have released video from Guthrie’s Nest doorbell camera—video that was believed to have been deleted because Guthrie wasn’t paying for the service.

Google’s cameras connect to the recently upgraded Home Premium subscription service. For $10 per month, you get 30 days of stored events, and $20 gets you 60 days of events with 10 days of the full video. If you don’t pay anything, Google only saves three hours of event history. After that, the videos are deleted, at least as far as the user is concerned. Newer Nest cameras have a small amount of local storage that can cache clips for a few hours in case connectivity drops out, but there is no option for true local storage. Guthrie’s camera was reportedly destroyed by the perpetrators.

Suspect in abduction approaches doorbell camera.

Expired videos are no longer available to the user, and Google won’t restore them even if you upgrade to a premium account later. However, that doesn’t mean the data is truly gone. Nancy Guthrie was abducted from her home in the early hours of February 1, and at first, investigators said there was no video of the crime because the doorbell camera was not on a paid account. Yet, video showing a masked individual fiddling with the camera was published on February 10.

The first video shows the person approaching the door and noticing the doorbell camera. They place their hand over the lens and appear to pull on the mounting bracket. Nest doorbell cameras have a small security screw that makes it difficult to remove them without causing damage. In the second video, the individual seems to try to drape a plant over the camera to block its view. Both videos are short, which is what you’d expect from an “event” as identified by the Google Home system.

Suspect attempts to cover camera with a plant.

In statements made by investigators, the video was apparently “recovered from residual data located in backend systems.” It’s unclear how long such data is retained or how easy it is for Google to access it. Some reports claim that it took several days for Google to recover the data.

In large-scale enterprise storage solutions, “deleted” for the user doesn’t always mean that the data is gone. Data that is no longer needed is often compressed and overwritten only as needed. In the meantime, it may be possible to recover the data. That’s something a company like Google could decide to do on its own, or it could be compelled to perform the recovery by a court order. In the Guthrie case, it sounds like Google was voluntarily cooperating with the investigation, which makes sense. Publishing video of the alleged perpetrator could be a major breakthrough as investigators seek help from the public.

It’s not your cloud

There is a temptation to ascribe some malicious intent to Google’s video storage setup. After all, this video expired after three hours, but here it is nine days later. That feels a bit suspicious on the surface, particularly for a company that is so focused on training AI models that feed on video.

We have previously asked Google to explain how it uses Nest to train AI models, and the company claims it does not incorporate user videos into training data, but the way you interact with the service and with your videos is fair game. “We may use your inputs, including prompts and feedback, usage, and outputs from interactions with AI features to further research, tune, and train Google’s generative models, machine learning technologies, and related products and services,” Google said.

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