What is generally a good way to pick up a firearm to preserve evidence?

To preserve evidence when picking up a firearm, always handle it by the edges or the non-firing surfaces to avoid contaminating potential fingerprints or trace evidence. Use gloves to prevent leaving your own fingerprints or DNA on the weapon. If possible, document the firearm's position and surroundings before moving it, and consider using evidence markers to maintain the scene's integrity. Always follow local laws and protocols regarding evidence collection and preservation.