T.J. Maxx is making some employees wear cameras to catch shoplifters

• Some T.J. Maxx and Marshalls employees are being asked to wear body cameras to combat retail theft.
• But the cameras aren't making much of a difference so far, employees told CNN.
• Retailers have talked about theft as a major issue for years, though measuring it remains tough.

The parent company of T.J. Maxx is outfitting some employees with body-mounted cameras in the latest example of how retailers are trying to counter theft at their stores.