What should be done with evidence until it can be photographed and measured?

The appropriate action with evidence until it can be photographed and measured is to allow it to remain unmoved. This is essential in preserving the integrity of the crime scene and ensuring that the evidence remains in its original position. Any alteration in the evidence's location can compromise its context and relations to other evidence or elements present, which could be crucial for the investigation.

By keeping the evidence in place, investigators can document its exact position and condition through photographs and measurements that are critical for future analysis and court proceedings. Proper handling and preservation at this stage are pivotal to maintaining a credible chain of custody. This approach minimizes the risk of contamination or loss of evidentiary value, which could affect the outcome of the case.