Which method is NOT typically used for gathering evidence by private investigators?

Issuing legal statements is not a typical method used by private investigators for gathering evidence. Instead, private investigators primarily rely on methods such as surveillance, interviewing witnesses, and researching public records to collect information relevant to their cases. Surveillance allows investigators to observe behaviors and activities over time, while interviewing witnesses can provide firsthand accounts and insights that are crucial in a variety of investigations. Researching public records helps them uncover valuable information that is accessible to the public, such as property ownership, court records, and background checks. In contrast, issuing legal statements is generally the domain of legal professionals like attorneys rather than private investigators and does not directly pertain to the evidence-gathering methods employed by investigators.