Despite efforts to prevent retail theft, Walgreens reported a 32% in "shrink," or a loss of inventory that can’t be accounted for through sales.

Retailers have been faced with increases in shoplifting and retail theft. But anti-theft prevention can hurt retail sales, says the CEO of Walgreens.

Some retailers, like Walgreens, report that locking items behind displays to deter shoplifting may not be effective. Walgreens CEO Tim Wentworth recently described theft prevention in stores as an ongoing and challenging struggle.