Mystery seed pod?
We are not sure of the identity of the seed pod. We do not have enough information. If this is a wet area, and there was a groundcover/perennial growing underneath or nearby the shrub, a possibility may be a Green Arrow Arum seed pod https://www.marylandbiodiversity.com/viewSpecies.php?species=1657
Look around in the area, and see what the flowers look like next spring and send us more photos.
The pictures you sent reminded me that I planted Calla Lillies in that spot. Thanks for your help. I think they are poisonous so I will not handle the pods any longer. Thanks for your help!