I find this funny because the police have been doing this with civilians. My main concern is that this tech is not 100% accurate. I feel like it shouldn't be used on its own.
I guess if it is used as a supplementary tool and not the main piece of evidence, it could maybe be okay? But I would be scared it would target an innocent individual, which could cause very negative or dangerous consequences. The main thing would be accuracy. I don't know if it was addressed as part of the article is paywalled.
Edit: I think anything that forces those in power to take accountability for their actions is great though. More tools should be in place to prevent abuse of power