Today I learned about the urine sensors installed in Atlanta subway elevators. The sensors trigger a loud alarm that jumps the police into an elevator to arrest the offender.
Source: http://commuting.blog.ajc.com/2017/06/16/more-urine-detectors-coming-to-marta-elevators/
Great post! The force is with you! You have been defended with a upvote from @talabs. Looking forward to hearing soon from you. Thank you.