What is essential when interviewing multiple witnesses at a scene?

Conducting interviews individually is essential when interviewing multiple witnesses at a scene because it helps prevent contamination of each witness's account. When witnesses are interviewed together, they may influence one another's recollections, either intentionally or unintentionally, leading to inconsistencies or the creation of a false consensus around certain details. Individual interviews allow each witness to provide their perspective without interference, ensuring the integrity of the information collected.

Additionally, individual interviews can help witnesses feel more comfortable sharing information that they might not disclose in a group setting, especially if it involves sensitive details or disagreements with other witnesses. This approach increases the likelihood of obtaining accurate and reliable statements, which are critical for the investigation.

While considering other methods like grouping witnesses or starting with the most vocal could have their merits in specific contexts, the primacy of individual interviews in preserving the accuracy and reliability of witness accounts is a fundamental practice in criminal investigations.