Sonya investigates the dead body found in the car on The Bridge Season 2 Episode 2.
The deceased is Fausto's enforcer, Garza, and his death leads Sonya to uncover another dead body. The situation is complicated when the dead guy turns out to be an undercover DEA agent.
Marco is called into the investigation by Captain Robles, but it's not his decision to send Marco back over the border to work with Sonya. It's going to get very messy.