You may have noticed that your local chain big box or drugstore has locked certain items behind plexiglass, requiring you to hail an employee to grab things like deodorant or laundry detergent. Companies say know this is annoying, but that it's necessary to prevent theft. So does it actually work? How big of a problem is retail theft anyway? Reporter Katherine Monahan went shopping for the answer.

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This story was reported by Katherine Monahan. Bay Curious is made by Olivia Allen-Price, Amanda Font, and Christopher Beale. Additional support from Cesar Saldana, Jen Chien, Katie Sprenger, Jasmine Garnett, Carly Severn, Jenny Pritchett and Holly Kernan.