1. Weed out bad apples. Run a background screening and a drug test on all potential hires. Employees with drug addictions are at higher risk for stealing to support their habit. “I believe that past behavior is a good predictor of future behavior,” says King Rogers, chief executive officer of the King Rogers Group, a loss prevention and security management consulting company. “If someone has been convicted of theft in the past, then you don’t want them handling your money.”