you know everything we know about the cousin at this point.
no confirmation he exists at all
if he does we don't know he was here
and if he was
we don't know he took a gun with him when he left
seems odd it would take a week to mention such a thing if you child was gone and the police asked you if you had any ideas, or who has been around
she said something about they showed her a picture but it wasn't him, like she doesn't know her cousins name, that makes no sense, if he exists she should be able to say he is so-and-so's son, they might know where he is
there is a sex offender in that state with a similar last name, but spelled different, and maybe the photo in question