Analysis reveals drug-sniffing dogs in Sydney gave false alerts 75% of the time over a decade, with a majority of the 94,000 searches failing to find illegal substances. Worst year: 2014 with only a 21% accuracy rate. Similar findings in other studies highlight a systemic issue.
https://norml.org/news/2023/10/05/analysis-drug-sniffing-dogs-typically-false-alert/