If you were Charles what will you do after knowing where Kelvin ran away to with the money you both won. Will you just let go,or you will go after him to get justice ? or how will you treat this issue.
Most likely go after him since $120k is too big of an amount to let go for most people just because you're friends. Then again, it's so dumb to rely on someone when you could've placed the same bet on your own.
all he can do is confront Kelvin. if he files a lawsuit against Kelvin, Charles would need to prove that they have an agreement that they would split the money if the bet won if they can't I am afraid that it won't go well for Charles.
I agree it wasn't specified, if the bet was placed at a betting shop then it's unlikely for Charles to gather some evidence to back his case but if it's done online then Charles could use their online transactions as the evidence.