Which condition should be avoided when handling evidence from firearms?

When handling evidence from firearms, it is crucial to ensure that magazines are removed from the weapon. Leaving magazines in the firearm can create several risks, including accidental discharges during transport or handling, as well as complicating the forensic analysis of the firearm. Removing the magazine helps to ensure the safety of personnel handling the evidence and preserves the integrity of the evidence itself, allowing for an accurate examination of the firearm without the risk of unintended firing. Proper protocol dictates that all safety measures be taken to prevent any hazardous situations, making the removal of magazines a critical step in evidence handling.