Which of the following must a suspect do to proceed to detainment?

To proceed to detainment, it is essential for a suspect to pass all points of purchase. This signifies that they have crossed the designated areas where purchases are typically made, which can indicate potential intent to steal or shoplift. In many retail environments, including grocery stores, crossing these points without completing a transaction raises suspicion, allowing security or management to take action.

Having a receipt, showing identification, or being accompanied by security may be relevant in various situations, but they do not inherently imply the necessary conditions for detainment. A receipt confirms a legitimate purchase, identification may verify an individual's identity, and being accompanied by security could ensure safety, but none of these conditions are prerequisites for initiating detainment if there is reasonable suspicion based on the act of passing all points of purchase.