I've heard Ricky a couple of times, near the Los Santos Beach.
Because GTA V is so big, it makes sense for them to re-use voice actors.
As for the model I think it's a coincidence.
Like the "Jimmy Hopkins" found in GTA IV. Who was black.
Also I've noticed they bought back the prefect's red dot feature back from Bully!
If you don't know what I mean, I mean if you "escape" the police, you'll see red dots [The Police] on your radar along with their "vision" if you will.
After I've completed the main story, I'll be looking for references/re-used things from other R* games.
So far:
Coyote sound from Red Dead Redemption. [REUSED]
Ricky Pucino voice actor [Used for a ped]
Grove Street from GTA SA [Reference.....?]
Packie/The Lost and Damned from GTA IV