Searching without a warrant
I am in Missouri. Without going into the long detailed story about what happened, I'll just provide the facts.
The people who lived at the home was not at home.
Cops came to speak to someone who was at the home.
The person who they wanted to speak with "might"(later found out not) been involved in a shooting
They knocked on the door and asked to come in and was told come on in.
They asked if any guns in the home.
Person at the home told them no.
They walked through the house and found a BB gun(unloaded) between the washer and dryer, and a compound bow(with no arrows) in the bathroom closet.
Walked back through to living room and said I thought you had no guns.
Person told them he didn't have any guns, wasn't his guns didn't know about them.
Told the person they were calling his probation officer and his probation would be revoked and they would be back.
Cops left with BB gun and bow
After they found out this person wasn't involved, they called him and told him no charges would be filed and come to sheriff's station in morning to pick up items.
Did the cops have a right to search the home without a warrant and without the home owner's permission? Did they have a right to take the BB gun and bow?
I was thinking they could say "probable cause", and because the "suspect" was there. However, suspect opened the door, so was not hiding in the home and he wasn't much of a suspect if they left him there.