Marco Severino is a man who owns the restaurant, Salato and is a part of a criminal organization with a man named Flaco.
Throughout The Series[]
In the Season Four episode The Overmining Marco meets Cal and Billy when they come into his restaurant after hours. He is familiar with a man named Rosario, who was busted by the Feds. He had never heard of Cal or Billy before and was slightly suspicious of them. He tells them that he's got a guy who could give them the best dope in the city before they reveal that they're the cops, Jake Peralta and Raymond Holt.
Severino is arrested and taken into interrogation where he doesn't reveal anything. CSI checked his entire restaurant and found no drugs and the last contact on his phone was to Flaco who they found at the warehouse the contact traced to.