Newton Baker is a pre-made Sim from Twinbrook, the town introduced in the The Sims 3: Ambitions. He lives in a large house with his mother Mary and his older brother Lincoln. He is enemies with his brother and friends with his mother. Outside of home, he only knows Rosy and Rich Whelohff, his mother's friends. At the beginning of the game, he has no skills. He is one of two pre-made teens that has the Mooch Trait, the other being a babysitter from Bridgeport, Peyton Suzuki.
It's likely that the deceased Bob-Andy Baker is Newton's father, as his biography hints that his father died recently, and they share some traits.