they have someone who works in their loss prevention department meet with the employee(s) about the theft. They usually also have between 2-3 managers present to verify they met with the employee(s )...
Grand theft is simply a way of describing the severity of a theft. It is usually applicable if the amount of the theft exceeds the state statutory amount. .
theft is/can be sneaky ie the victim takes time to notice that its happen ie pick pocket shoplifting, someone you know sticks things in there pocket from you home , your child takes money out of you...