What should be done if dried blood stains are found on large solid objects?

When dried blood stains are found on large solid objects, the best practice is to cover the area with clean paper and seal it down. This method preserves the evidence in its original state and minimizes the risk of contamination or degradation. By sealing the area, it ensures that no additional materials can interfere with further testing or analysis, maintaining the integrity of the evidence.

Covering the area helps to protect the blood stains from environmental factors, such as weather or handling, which could compromise the samples. Additionally, this approach allows forensic experts to analyze the stains in a controlled manner later, as opposed to attempting to remove or alter the evidence prematurely. This preservation technique is vital in criminal investigations, where the chain of custody and the accurate representation of evidence are critical for legal proceedings.