What does Bigger leave untouched in his first few days of jail?

Bigger Thomas ekes out an existence as a petty criminal on the South Side of Chicago during the 1930s. It's far from being an easy life. Arrest, serious injury, and even death are just some of the many occupational hazards involved. A job as a chauffeur with a wealthy white family seems to offer Bigger a way out. Soon, he's befriended by the daughter of the family, a rebellious, high-spirited young lady by the name of Mary. One night, afraid of being caught in a compromising position with Mary, Bigger tries to keep her quiet by placing a pillow over her mouth. Unfortunately, he ends up smothering her to death.
Bigger is subsequently arrested, not just for killing Mary, but for the rape and murder of his girlfriend, Bessie. During his first few days in police custody, he refuses to speak and leaves his food completely untouched. Unsurprisingly, a lack of food makes Bigger weak, and he collapses when he's brought to the inquest. When he eventually comes round, he asks for a drink of milk and a newspaper to read.