Let's assume that you hire someone after checking to be certain that he or she
has a good driving record. However, a year later, due to a personal crisis, he
or she starts to drink heavily or to abuse drugs. You do not periodically check
his or her driving record or periodically drug test him or her, and when he or
she injures someone with a vehicle while on company business, or assaults someone,
among other things, you are likely to be sued for negligent retention.