AZ crime scene - SIXTEEN gloves collected. Most belonged to searchers who discarded them while working in the area. WTF?

"The glove, which contains DNA evidence, was one of approximately 16 gloves collected by investigators in various areas near the house. Most of those gloves belonged to searchers who discarded them while working the area, the FBI said."

https://www.cbsnews.com/news/nancy-guthrie-disappearance-arizona-fbi-glove-update/