1.    General Rule
a.    The first possessor is superior to any subsequent possessor (first in time theory)
2.    Exceptions
a.    Person who has or has had possession of a property item has a property interest in the item.
b.    More than one person may have an interest in a property item.
c.    The true owner has priority over everybody.
d.    Law is unclear about who has possession if the prior possessor acquired the item by theft or other illegal means.
e.    The finder does not have absolute ownership.
i.    Nemo Dat – you can’t give a greater interest than the interest you possess, but you may give a lesser interest
f.    Possession might be a proxy to title.