After robbing. a casino in Vegas, A pair of prodigal biracial twin arrive in New York to start a new life but the trouble they lelf in VEgas didn’t stay in Vegas

Is biracial important because each sibling is on the far racial spectrum from each other? Otherwise, I don't believe it's relevant for the logline. lelf? VEgas?

I have a lot of questions on how the two of them managed to rob a casino? Maybe leave that part out and find an alternative way to add to the looming threat. Who specifically is after them?