[Daniel3]

"It’s obvious that the police will want a device that produces more convictions, no point in disputing that." Uh, why couldn't we talk about it as adults? OP's answer below is excellent. Police want a device that will make their job most effective and profitable, with the lowest margin not only for legal repercussions, but also the lowest possibility of people like you deciding that all police officers are pure evil who just want as many convictions as possible. Doesn't everybody want their job to be like that? BLM has made some good progress (and more is needed yet) scaring some pure evil people who happen to be police officers into wanting what's good and right. Probably not prudent to worry about a new technology that might be oversensitive, especially when the first time this thing is used in a conviction by a person with a rich dad, they'll spend as much as possible throwing doubt on the research supporting it, or how the officer was trained to use it, or etc etc etc, in order to build plausible deniability in court and get the case thrown out.