'Smell detectors' could be used to monitor criminals at home"Smell detectors" and AI cameras could be used to catch drug use inside and outside of prison.
Source: 'Smell detectors' could be used to monitor criminals at home (https://news.sky.com/story/smell-detectors-could-be-used-to-catch-drug-abuse-both-inside-and-outside-of-prison-13391235)