Final answer:
The most significant force multiplier in the investigative function is typically advances in technology, which bolster the capabilities for gathering and analyzing information.
Step-by-step explanation:
The most significant force multiplier in the investigative function could be a number of factors depending on the context of the investigation. However, one overarching element that serves to amplify the effectiveness of an investigation is technology. Communication can also help investigators build rapport and trust with witnesses or suspects, gather accurate information, and present their findings clearly and persuasively. Advances in technology, such as digital forensics, data analytics, and surveillance capabilities, have exponentially increased the ability of investigators to gather, analyze, and manage information. Other potential force multipliers might include organizational strategies like task forces or inter-agency cooperation, legal tools such as subpoenas or warrants, and the expertise of the investigators themselves.