May was suspected of selling stolen goods in interstate commerce. FBI agents got a warrant to search her office. During the search, the FBI found papers evidencing her crime. Two days later, the FBI found some stolen goods when they conducted a warrantless search of May's car. A week later, an FBI agent was walking on a public sidewalk outside May's offices when he saw more stolen goods that May disposed of in a public dumpster. What evidence can be used against May?