Officers are advised to maintain contact and keep each other in sight during an investigation primarily to:

Maintaining contact and keeping each other in sight during an investigation is crucial for ensuring communication and safety among officers. This practice enhances their ability to coordinate effectively and respond quickly to any changes in the situation, which is especially important in potentially volatile scenarios like family violence.

Having officers in close proximity allows them to share real-time information and observations, which can influence decision-making and the approach to handling the case. Additionally, with safety as a primary concern, being in sight of one another helps to provide mutual support and protection, reducing the risk of individual officers being isolated or overwhelmed in a tense situation.

In contrast, while establishing a visible presence can deter further disputes, it does not address the specific need for communication between officers. Impressive demeanor or facilitating discussions between disputants is less relevant in this context, as the primary focus should be on officer safety and effective teamwork during an investigation.