Which of the following is NOT a method for developing witnesses?

The correct answer identifies appraisal of stolen items as not a method for developing witnesses. Developing witnesses typically involves engaging with individuals who may have seen or heard something relevant to the investigation, or who can provide valuable information.

Crime scene assessments involve gathering evidence and potential witnesses at the site of the crime. A neighborhood canvas is a proactive approach where law enforcement officers go door to door to interview residents, seeking to find anyone who may have witnessed the crime or have relevant information. Surveillance can involve monitoring specific areas to identify potential witnesses or observe criminal activity directly.

In contrast, the appraisal of stolen items focuses on evaluating the value or condition of stolen property rather than gathering testimonials or eyewitness accounts. This process lacks the direct engagement with people that is vital in witness development, making it unsuitable for that purpose.