What is the first step if an investigator suspects the presence of a liquid?

When an investigator suspects the presence of a liquid, taking samples is an essential first step because it allows for the analysis of the liquid to determine its composition and whether it poses a risk or has any relevance to the investigation. Properly collecting samples can provide crucial information regarding the nature of the liquid, whether it is flammable, corrosive, or otherwise hazardous, and can aid in establishing connections to the incident being investigated.

Taking samples responsibly and following appropriate protocols is vital to avoid contamination and ensure that the evidence is preserved for further examination. This initial action can inform subsequent steps, such as evacuating the area or establishing a containment zone, if the nature of the liquid indicates a potential hazard or requires further safety measures.

Understanding the nature of the liquid can also help guide investigators in determining its potential role in the incident, whether as an accelerant in a fire or something that needs to be addressed to avoid environmental contamination or exposure to toxic substances.